close

Вход

Забыли?

вход по аккаунту

?

JP2014107751

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2014107751
Abstract: The present invention provides a speaker system capable of reducing directivity with
respect to a declination angle based on the normal direction of an audio output surface while
suppressing vibration of the entire speaker system. A speaker system 1 according to an aspect of
the present invention includes a speaker 11 disposed at one end in the longitudinal direction of
an enclosure 21 and having an audio output surface opposite to the enclosure 21; The speaker
12 is disposed at one end and the audio output surface is located on the opposite side to the
enclosure 22. The audio output surfaces of the speaker 11 and the speaker 12 are disposed to
face each other. [Selected figure] Figure 1
Speaker system, control method, program, and recording medium
[0001]
The present invention relates to a speaker system and a control method of the speaker system.
The present invention also relates to a program for operating the speaker system and a recording
medium in which such a program is recorded.
[0002]
Conventionally, in a speaker system, two direct radiation speakers are arranged in parallel
(simply arranged on the left and right sides) so that the sound output surfaces (that is, the
diaphragms constituting the speakers) face in the same direction. Are also described). Such a
03-05-2019
1
conventional speaker system can form an optimal sound field at equal positions from the left and
right speakers, but deviates from the positions at equal distances from the speakers. It is not
possible to form an optimal sound field.
[0003]
In addition, the direct radiation type speaker constituting the conventional speaker system has a
problem that a reaction to the movement of the diaphragm acts on the speaker to vibrate.
[0004]
For such a problem, for example, in Patent Document 1, a pair of speakers are opposed on the
same straight line, a conical sound diffuser is placed at the center, and curved surfaces on the
baffle surface to which the speakers are attached have A horn speaker device is disclosed that is
configured to have a horn shape.
[0005]
Further, in Patent Document 2, two opposing dome speakers and two opposing bass speakers are
coaxially provided, and a horn is formed by a rotational curved surface formed between the two
dome speakers, and a lower portion of the cylindrical enclosure A speaker system is disclosed
that has a plurality of acoustic emission windows on the side.
[0006]
As another configuration for realizing a nondirectional speaker system, as described in Patent
Document 3, a bass reproduction unit (bass speaker) and a treble reproduction unit (speaker
speaker) are provided on the upper side of a cylindrical casing. Are arranged coaxially, and the
speaker system is configured by forming a horn shape by the curved surface of the holding
housing of the high-sound reproduction unit and the curved surface of the reflector having the
same curved surface as the curved surface of the holding housing. Is also proposed.
[0007]
Japanese Patent Application Laid-Open No. 2005-318484 (released on November 10, 2005)
Japanese Patent Application Laid-open No. 04-216300 (released on August 6, 1992) Japanese
Patent Application Laid-Open No. 05-056493 (released on March 5, 1993) The 2011-0814146
publication (April 28, 2011 release)
[0008]
03-05-2019
2
However, in the technique described in Patent Document 1, the sound output in the normal
direction of the output surface (sound output surface) of the sound of the speaker is blocked by
the baffle surface provided with the facing speaker.
Further, in the technology described in Patent Document 2, the sound is output in a direction
perpendicular to the normal direction of the sound output surface (parallel to the sound output
surface) by the rotation curved surface formed between the two opposing dome speakers .
[0009]
For this reason, in the techniques described in Patent Documents 1 and 2, the sound quality
fluctuates depending on the angle between the normal direction of the sound output surface and
the sound propagation direction, that is, the normal direction of the sound output surface There
is a problem that the directivity is high with respect to the declination based on.
[0010]
The present invention has been made to solve the above-described problems, and its object is to
suppress directivity of a declination angle based on the normal direction of the sound output
surface while suppressing vibration of the entire speaker system. To provide a speaker system
that can be
[0011]
A speaker system according to one aspect of the present invention is disposed at one longitudinal
end of a first elongated enclosure, and an audio output surface is opposite to the first elongated
enclosure, in order to solve the problems described above. And a second speaker disposed at one
longitudinal end of the second elongated enclosure and having an audio output surface opposite
to the second elongated enclosure. The audio output surface of the first speaker and the audio
output surface of the second speaker are disposed to face each other.
[0012]
According to the above configuration, the speaker system can reduce the directivity regarding
the declination angle based on the normal direction of the sound output surface while
suppressing the vibration of the entire speaker system.
03-05-2019
3
[0013]
BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the principal part structure of
the speaker system which concerns on one Embodiment of this invention, (a) shows the outline
of the speaker system 1, (b) is a disassembled perspective view of the speaker system 1, (c) is a It
is an AA 'cross section figure of (a).
It is a BB 'sectional view of (c) of FIG. 1, (a) shows the case where there are two connecting rods,
(b) shows the case where there are three connecting rods, (c) shows The case where there are
four connecting rods is shown.
It is a figure which shows the directional characteristic of the horizontal direction of the
conventional speaker system, (a) shows the analysis position of a directional characteristic, (b) is
a graph which shows the directional characteristic of a horizontal direction.
It is a figure which shows the directional characteristic of the horizontal direction of the speaker
system which concerns on one Embodiment of this invention, (a) shows the analysis position of a
directional characteristic, (b) is a graph which shows the directional characteristic of a horizontal
direction.
It is a figure which shows the directional characteristic of the perpendicular direction of the
conventional speaker system, (a) is a figure which shows the analysis position of a directional
characteristic, (b) and (c) is a graph which shows the directional characteristic of the
perpendicular direction.
It is a figure which shows the directional characteristic of the orthogonal | vertical direction of
the speaker system which concerns on one Embodiment of this invention, (a) is a figure which
shows the analysis position of directional characteristic, (b) and (c) are directional characteristics
in the vertical direction. Is a graph showing
It is a figure showing an example of a speaker system concerning other embodiments of the
present invention, and (a) shows an outline of a speaker system whose upper enclosure is longer
than a lower enclosure, (b) is shown in (a) Fig. 1 shows an overview of a television with a
loudspeaker system.
03-05-2019
4
It is a figure which shows another example of the speaker system which concerns on other
embodiment of this invention, (a) shows an overview of a speaker system whose upper enclosure
is shorter than a lower enclosure, (b) shows (a). Fig. 1 shows an overview of a television
comprising the loudspeaker system shown in Fig. 1;
It is a figure which shows the further another example of the speaker system which concerns on
other embodiment of this invention, (a) shows the outline of a speaker system provided with a
reflecting plate, (b) shows the speaker system shown to (a). It shows an overview of the television
provided. It is a state transition diagram at the time of the reflecting plate with which the speaker
system which concerns on other embodiment of this invention is equipped rotating, (a) shows the
state which the reflecting plate rotated clockwise, (b) shows the reflecting plate left It shows a
state of rotating around. It is a figure which shows an example of a structure of the speaker
system which concerns on further another embodiment of this invention, (a) is an exploded
perspective view of a speaker system, (b) is a CC 'sectional view of (a). is there. It is a figure
which shows another example of a structure of the speaker system based on other embodiment
of this invention, (a) is a disassembled perspective view of a speaker system, (b) is a DD 'cross
section of (a) FIG. It is a figure which shows a further another example of a structure of the
speaker system based on the further another embodiment of this invention, (a) is a disassembled
perspective view of a speaker system, (b) is EE 'of (a). FIG. It is a figure which shows the principal
part structure of the drive device based on further another embodiment of this invention. It is a
figure which shows the change range of localization of an audio | voice at the time of using the
speaker system which concerns on other embodiment of this invention. The speaker system
which concerns on further another embodiment of this invention WHEREIN: It is a figure which
shows the sound field in case the audio | voices which each output from an opposing speaker are
the same volume. In the speaker system concerning further another embodiment of the present
invention, it is a figure showing the sound field in case the volume of the sound outputted from
the opposite speaker is different, respectively. In the speaker system concerning further another
embodiment of the present invention, it is a graph which shows the characteristic of the sound at
the time of changing the distance between the opposing speakers.
[0014]
First Embodiment A speaker system according to an embodiment of the present invention will be
described below with reference to FIGS. 1 to 6. However, the configuration described in this
embodiment is not intended to limit the scope of the present invention to that alone, unless
otherwise specifically described, and is merely an illustrative example.
03-05-2019
5
[0015]
[Configuration of Speaker System] First, the speaker system according to the present
embodiment will be described with reference to FIG. FIG. 1 is a view showing the main
configuration of a speaker system 1 according to the present embodiment. FIG. 1A is a view
showing an overview of the speaker system 1, FIG. 1B is an exploded perspective view of the
speaker system 1, and FIG. 1C is a cross-sectional view taken along line AA ′ of FIG. is there.
[0016]
As shown in FIG. 1A, the speaker system 1 according to this embodiment includes an audio
output unit 10, a transmission cable 20, an enclosure (first elongated enclosure) 21, and an
enclosure (second elongated shape) An enclosure) 22 is provided.
[0017]
(Audio Output Unit) The audio output unit 10 is a means for outputting the audio represented by
the supplied audio signal.
As shown in (b) and (c) of FIG. 1, the audio output unit 10 includes a speaker (first speaker) 11, a
speaker (second speaker) 12, a connecting rod (rod-like member) 13, and a speaker A net 14 is
provided.
[0018]
The speakers 11 and 12 output the sound indicated by the sound signal by converting the input
sound signal into physical vibration. Specifically, the speakers 11 and 12 vibrate the diaphragm
(15 in FIG. 2 described later) included in the speakers 11 and 12 in accordance with the input
audio signal, thereby displaying the audio indicated by the audio signal. Output.
[0019]
03-05-2019
6
As shown in (b) of FIG. 1, the speaker 11 is disposed at one end in the longitudinal direction of a
main enclosure (first main enclosure) 23 described later, and a surface (audio output surface) on
which the diaphragm 15 is provided. Are arranged on the opposite side of the main enclosure 23.
Further, the speaker 12 is disposed at one end in the longitudinal direction of a main enclosure
(second main enclosure) 24 described later, and is disposed such that the audio output surface is
on the opposite side to the main enclosure 24.
[0020]
Furthermore, the speakers 11 and 12 are arranged to face each other. More specifically, the
audio output surface of the speaker 11 and the audio output surface of the speaker 12 are
disposed to face each other.
[0021]
The connecting rod 13 connects the speaker 11 and the speaker 12 so that the audio output
surfaces face each other. The connecting rod 13 fixes the positional relationship between the
speaker 11 and the speaker 12 facing each other, and fixes the distance between the speaker 11
and the speaker 12.
[0022]
The number of connecting rods 13 is not particularly limited as long as it is two or more, but it is
preferable that the number be small in order to avoid blocking the sound output from the
speakers 11 and 12. Specifically, the number of connecting rods 13 is preferably about two to
four. The connecting rod 13 is preferably a thin rod-like member in order to avoid inhibiting the
propagation of the sound output from the speakers 11 and 12.
[0023]
This is because, among the sounds output from the speakers 11 and 12, the sound of which the
propagation is inhibited is more than the case where the shape of the member connecting the
speakers 11 and 12 is a shape other than a bar (for example, a plate). This is because the amount
can be reduced.
03-05-2019
7
[0024]
Here, the speakers 11 and 12 and the connecting rod 13 will be described with reference to FIG.
Since the speakers 11 and 12 have the same configuration, the speaker 11 will be particularly
described here. FIG. 2 is a cross-sectional view taken along the line B-B 'of (c) of FIG. (A) of FIG. 2
shows the case where there are two connecting rods 13, (b) shows the case where there are three
connecting rods 13, (c) shows that there are four connecting rods 13. The case is shown.
[0025]
As shown in FIG. 2, the speaker 11 includes a diaphragm 15 and a frame 16. The diaphragm 15
converts an audio signal (electric signal) into physical vibration together with a coil (not shown)
provided in the speaker 11 and outputs sound from the speaker 11 by vibrating the diaphragm
15 itself. In addition, the frame 16 is a housing that supports members constituting the speaker
11.
[0026]
As shown to (a)-(c) of FIG. 2, the connection stick | rod 13 is arrange | positioned at the flame |
frame 16 with which the speaker 11 is equipped. Moreover, as shown to (b)-(c) of FIG. 1, the
connection stick | rod 13 is provided so that the speaker 11 and the speaker 12 which opposes
the speaker 11 may be connected.
[0027]
Further, the connecting rod 13 is spaced at equal intervals (for example, as shown in (a) to (c) of
FIG. 2, for example, 180 degrees, 120 degrees, and 90 degrees) with the centers of the speakers
11 and 12 as the origin. It is arranged. Thus, by arranging the connecting rods 13 at equal
angles, the vibrations of the speakers 11 and 12 can be effectively canceled out.
03-05-2019
8
[0028]
The position where the connection rod 13 is disposed is not particularly limited. For example, the
connection rod 13 is provided on a surface of one end of the main enclosure 23 in which the
speaker 11 is disposed in the longitudinal direction and around the speaker 11 It may be done.
In this case, the connecting rod 13 is a surface at one end in the longitudinal direction of the
main enclosure 23 in which the speaker 11 is disposed, and a surface opposite to the surface and
in the longitudinal direction It should just be provided so that the surface of one end may be
connected.
[0029]
The connecting rod 13 connects the speakers 11 and 12 such that the distance between the
speaker 11 and the speaker 12 is equal to or larger than the size (diameter) of the speaker 11
and the diaphragm 15 provided in the speaker 12. Thus, the standing waves generated between
the speaker 11 and the speaker 12 can be suppressed by the sound outputted from both the
speakers 11 and 12.
[0030]
The speaker net 14 is a protective member that protects the speakers 11 and 12. The speaker
net 14 can reduce the deterioration of the performance of the speakers 11 and 12 caused by
dust or the like.
[0031]
(Transmission Cable) The transmission cable 20 is a cable for transmitting an audio signal, and
transmits an audio signal input from the outside to the speakers 11 and 12 provided in the audio
output unit 10.
[0032]
The transmission cable 20 is bifurcated in the audio output unit 10 as shown in (b) of FIG.
03-05-2019
9
One of the bifurcated transmission cables 20 is connected to the speaker 11 through the main
enclosure 23, and the other is connected to the speaker 12 through the main enclosure 24.
[0033]
(Enclosure) The enclosures 21 and 22 are elongated housings accommodating the speakers 11
and 12. In the present embodiment, as shown in FIG. 1A, the case where the shapes of the
enclosures 21 and 22 are cylindrical will be described as an example, but the present invention is
not limited to this. For example, It may have a prismatic shape or a rugby ball shape.
[0034]
Further, the enclosures 21 and 22 are disposed substantially on the same axis, as shown in FIG. 1
(a).
[0035]
As shown in (b) and (c) of FIG. 1, the enclosure 21 is configured by a main enclosure 23 and a
sub enclosure (first sub enclosure) 25.
Also, the enclosure 22 is constituted by a main enclosure 24 and a sub enclosure (second sub
enclosure) 26.
[0036]
The speaker 11 (12) is connected to one end in the longitudinal direction of the main enclosure
23 (24), and the sub enclosure 25 (26) is connected to the other end. The main enclosure 23 (24)
and the sub enclosure 25 (26) may be connected by, for example, a screw cap method, but the
connection method is not particularly limited.
[0037]
03-05-2019
10
Moreover, the enclosures 21 and 22 can adjust the length arbitrarily. Specifically, sub-enclosures
of various lengths may be prepared as the sub-enclosures 25 and 26 constituting the enclosures
21 and 22, respectively. That is, by adopting sub-enclosures of any length among the subenclosures of various lengths as the sub-enclosures 25 and 26, the lengths of the enclosures 21
and 22 can be arbitrarily adjusted.
[0038]
The method of adjusting the length of the enclosures 21 and 22 is not limited to this. For
example, sub-enclosures 25 and 26 may be configured to be extendable, and an arrangement
may be adopted in which sub-enclosures 25 and 26 are adjusted to any length, and the lengths of
enclosures 21 and 22 are arbitrarily adjusted. .
[0039]
[Direction Characteristics of Speaker System] Next, the characteristics of the speaker system 1
according to the present embodiment will be described with reference to FIGS. 3 to 6. Below, the
case where the longitudinal direction of the speaker system 1 is arrange | positioned to a
perpendicular direction is mentioned as an example, and is demonstrated. In the present
embodiment, the in-plane direction perpendicular to the longitudinal direction of the speaker
system 1 (also described as the normal direction of the sound output surface of the speakers 11
and 12) is referred to as the horizontal direction. Further, the in-plane direction defined by the
longitudinal direction of the speaker system 1 and the declination angle based on the
longitudinal direction is referred to as the vertical direction.
[0040]
(Direction Characteristics in Horizontal Direction) First, the directivity characteristics in the
horizontal direction of the speaker system 1 will be described with reference to FIGS. 3 and 4 in
comparison with the directivity characteristics in the horizontal direction of the conventional
speaker system.
[0041]
03-05-2019
11
FIG. 3 is a diagram showing directivity characteristics in the horizontal direction of the
conventional speaker system.
(A) of FIG. 3 is a figure which shows the analysis position of the directional characteristic in the
conventional speaker system, (b) is a graph which shows the directional characteristic of the
horizontal direction of the conventional speaker system. Moreover, FIG. 4 is a figure which shows
the directivity characteristic of the horizontal direction of the speaker system 1 which concerns
on this embodiment. FIG. 4A is a diagram showing an analysis position of directivity
characteristics in the speaker system 1, and FIG. 4B is a graph showing directivity characteristics
in the horizontal direction of the speaker system 1.
[0042]
As shown in (a) of FIG. 3, the conventional speaker system is configured by two direct radiation
speakers arranged on the left and right (arranged in the Y-axis direction). In this embodiment, as
shown in (a) of FIG. 3, the angles from the X axis (that is, the front of the conventional speaker
system) on the XY plane are 0 degree, 30 degrees, 60 degrees and 90 degrees (Y axis The voice
output from the conventional speaker system in the horizontal direction (in the XY plane
direction) is analyzed at the position where), and the analysis result is shown in the graph of FIG.
[0043]
In addition, as shown in (a) of FIG. 4, the angle from the x axis is 0 degrees, 30 degrees, 60
degrees, and the like on the xy plane (on planes (equidistant planes) having equal distances from
the speakers 11 and 12) The sound output from the speaker system 1 in the horizontal direction
(xy plane direction) is analyzed at the position of 90 degrees (y axis), and the analysis result is
shown in the graph of FIG.
[0044]
In the conventional speaker system, as shown in FIG. 3 (b), the sound pressure of the high
frequency component of the analyzed voice (in particular, the high frequency band of 5 kHz or
more) is high at 0 degrees and approaches 90 degrees. (That is, it deviates from the front of the
conventional speaker system).
03-05-2019
12
That is, in the conventional speaker system, the directivity characteristic in the horizontal
direction is high, and the way of hearing the sound is different depending on the position.
[0045]
On the other hand, as shown in FIG. 4B, the speaker system 1 according to the present
embodiment is applicable to any frequency band of voices analyzed at each position of 0 degree,
30 degrees, 60 degrees and 90 degrees. , Almost no difference appeared. That is, the speaker
system 1 has low directivity in the horizontal direction (that is, directivity regarding a direction
perpendicular to the normal direction of the sound output surface of the speakers 11 and 12),
and audio can be heard regardless of the position with respect to the speaker system 1 (Sound
quality) becomes almost constant.
[0046]
(Directional Characteristics in the Vertical Direction) Next, the directional characteristics in the
vertical direction of the speaker system 1 will be described with reference to FIGS. 5 and 6 in
comparison with the directional characteristics in the vertical direction of the conventional
speaker system.
[0047]
FIG. 5 is a diagram showing the directivity characteristic in the vertical direction of the
conventional speaker system.
(A) of FIG. 5 is a figure which shows the analysis position of the directivity in the conventional
speaker system, (b) and (c) is a graph which shows the directivity of the perpendicular direction
of the conventional speaker system. Moreover, FIG. 6 is a figure which shows the directivity
characteristic of the orthogonal | vertical direction of the speaker system 1 which concerns on
this embodiment. (A) of FIG. 6 is a figure which shows the analysis position of the directional
characteristic in the speaker system 1, (b) and (c) is a graph which shows the directional
characteristic of the orthogonal | vertical direction of the speaker system 1. As shown in FIG.
[0048]
03-05-2019
13
In the conventional speaker system, as shown in FIG. 5A, the angle from the X axis is 0 degrees,
30 on the XZ plane (on a plane equidistant from the two speakers constituting the conventional
speaker system). Vertical from the conventional speaker system at positions where the angle is
60 degrees and 90 degrees (the positive direction of the Z axis) and positions where 0 degrees, 30 degrees, -60 degrees and -90 degrees (the negative direction of the Z axis) The voice output in
the direction (XZ plane direction) is analyzed, and the analysis results are shown in the graphs of
(b) and (c) of FIG.
[0049]
Further, as shown in (a) of FIG. 6, positions at which the angle from the x axis is 0 degree, 30
degrees, 60 degrees and 90 degrees (z-axis positive direction) on the xz plane, and 0 degrees, −
The sound output from the speaker system 1 in the vertical direction (xz plane direction) is
analyzed at positions of 30 degrees, -60 degrees and -90 degrees (z-axis negative direction), and
the analysis results are shown in FIG. And the graph of (c).
[0050]
In the conventional speaker system, as shown in (b) and (c) of FIG. 5, the sound pressure of the
high frequency component of the analyzed voice (in particular, the high frequency band of 1 kHz
or more) is high at the position of 0 degrees, It became lower as it approached 90 degrees and 90 degrees (that is, away from the X axis).
That is, in the conventional speaker system, the directivity characteristic in the vertical direction
is high, and the way of hearing the sound is different depending on the position.
[0051]
On the other hand, in the speaker system 1 according to the present embodiment, as shown in (b)
and (c) of FIG. 6, the voice analyzed at each position of 0 degree to 90 degrees and 0 degree to 90 degrees. The differences in the sound pressure in any frequency band were extremely small
as compared with (b) and (c) in FIG.
That is, the speaker system 1 has lower directivity in the vertical direction (that is, directivity
regarding the declination angle based on the normal direction of the sound output surface) than
03-05-2019
14
the conventional speaker system, regardless of the position with respect to the speaker system 1.
The way you hear the sound is almost constant.
[0052]
As described above, the shapes of the enclosures 21 and 22 are elongated, and the sound output
surfaces of the speakers disposed at one longitudinal end of each enclosure face each other. By
this configuration, the sound output from one of the speakers provided in the speaker system 1
is inhibited from propagating except at one longitudinal end of the elongated enclosure provided
with the other speaker and the other speaker. There is nothing to do.
[0053]
The enclosures 21 and 22 are cylindrical in shape, and the thinner they are, the more the
obstruction to the sound propagation by the enclosures 21 and 22 can be reduced.
[0054]
As described above, by arranging the sound output surfaces of the speakers 11 and 12 to face
each other, the speaker system 1 according to the present embodiment can obtain excellent
nondirectionality in all directions.
[0055]
The speaker system 1 according to the present embodiment can output voice with low directivity
in the direction of 360 degrees in the horizontal direction (the xy plane (equidistant plane)
direction in (a) of FIG. 4).
Further, the speaker system 1 can output sound in the direction of 180 degrees in the vertical
direction (the yz plane direction in (a) of FIG. 1).
[0056]
Further, the speaker system 1 arranges the sound output surfaces of the speakers 11 and 12 so
03-05-2019
15
as to face each other, so that the vibration generated when the speaker 11 (12) outputs a sound
can be detected by the other speaker 12 11) can be canceled by the vibration generated when
outputting a voice.
Since the vibration of the whole speaker system 1 can be suppressed by this, generation |
occurrence | production of the vibration noise resulting from the vibration of the speaker system
1, a chattering sound, etc. can be suppressed.
[0057]
Furthermore, in the present embodiment, the speaker system 1 can adopt an enclosure having a
diameter of about 2.54 cm (about 1 inch) as the cylindrical enclosures 21 and 22. Thereby, the
speaker system 1 can be made into an elongated tubular structure. With such an elongated
cylindrical structure, for example, even when the speaker system 1 is disposed beside a display
device such as a television, the design of the television is not impaired.
[0058]
In the present embodiment, the case where the speaker 11 and the enclosure 21 are located on
the upper side of the speaker system 1 and the speaker 12 and the enclosure 22 are located on
the lower side is described as an example. It may be That is, the speaker 12 and the enclosure 22
may be located above the speaker system 1, and the speaker 11 and the enclosure 21 may be
located below.
[0059]
That is, even if the positional relationship between the speaker 11 and the enclosure 21 and the
speaker 12 and the enclosure 22 is vertically reversed, the characteristics of the speaker system
1 are not affected at all.
[0060]
Second Embodiment In the first embodiment, the case where the lengths of the enclosures 21
and 22 included in the speaker system 1 are the same has been described as an example, but the
03-05-2019
16
present invention is not limited to this.
Hereinafter, a speaker system 2 according to another embodiment of the present invention will
be described with reference to FIGS. 7 to 9.
[0061]
Note that, for convenience of explanation, components having the same functions as those of the
speaker system 1 according to the first embodiment are given the same reference numerals, and
descriptions thereof will be omitted. In the present embodiment, differences from the first
embodiment will be mainly described.
[0062]
FIG. 7 is a view showing an example of the speaker system 2 according to the present
embodiment. 7A shows an overview of the speaker system 2 in which the enclosure 21 is longer
than the enclosure 22 and FIG. 7B shows an overview of a television receiver (television) 100
provided with the speaker system 2 shown in FIG. 7A. It shows.
[0063]
Moreover, FIG. 8 is a figure which shows another example of speaker system 2 'which concerns
on this embodiment. FIG. 8 (a) shows an overview of a speaker system 2 'in which the enclosure
21 is shorter than the enclosure 22, and (b) shows an overview of a television 100 equipped with
the speaker system 2 shown in (a).
[0064]
As shown in FIG. 7 and FIG. 8, the speaker system 2, 2 ′ according to the present embodiment
includes the attachment portion 31, and the speaker according to the first embodiment except
that the lengths of the enclosures 21 and 22 are different from each other. It has the same
configuration as system 1.
03-05-2019
17
[0065]
As shown in (a) of FIG. 7, the enclosure 21 provided in the speaker system 2 is longer than the
enclosure 22.
Therefore, as shown in (a) of FIG. 7, the audio output unit 10 is positioned below the center of
the speaker system 2.
[0066]
Further, as shown in FIG. 7A, the attachment portion 31 is disposed at one end of the enclosures
21 and 22 provided in the speaker system 2 and at one end opposite to the end where the audio
output portion 10 is disposed. It is done. The speaker system 2 is connected to the television 100
by the attachment portion 31 as shown in FIG. 7B. Therefore, the audio output unit 10 of the
speaker system 2 connected to the television 100 is located below the center of the television
100 in the short direction.
[0067]
As shown in (b) of FIG. 7, by positioning the audio output unit 10 of the speaker system 2 below
the center of the television 100 in the short direction, the speaker system 2 can easily hear the
sound and settle the sound field. Can be formed. For example, a sound field having a calm and
easy-to-listen atmosphere is more effective when the content to be viewed is news.
[0068]
Moreover, as shown to (a) of FIG. 8, the enclosure 21 with which speaker system 2 'is provided is
shorter than the enclosure 22. As shown to (a) of FIG. Therefore, as shown in (a) of FIG. 8, the
audio output unit 10 is positioned above the center of the speaker system 2.
[0069]
03-05-2019
18
Further, as shown in FIG. 8A, at one end of the enclosures 21 and 22 included in the speaker
system 2 ′, the attachment portion 31 is provided at one end opposite to the end where the
audio output unit 10 is disposed. It is arranged. The speaker system 2 ′ is connected to the
television 100 by the attachment portion 31 as shown in FIG. 8 (b). Therefore, the audio output
unit 10 of the speaker system 2 ′ connected to the television 100 is located above the center of
the television 100 in the short direction.
[0070]
As shown in (b) of FIG. 8, by positioning the audio output unit 10 of the speaker system 2 ′
above the center in the short direction of the television 100, the speaker system 2 can create a
sound field with a sense of reality Can be formed. For example, a realistic sound field is more
effective when the content to be viewed is a movie.
[0071]
In the present embodiment, the configuration in which the audio output unit 10 is positioned
above the center of the speaker system 2 ′ by taking the enclosure 21 shorter than the
enclosure 22 has been described by way of example. It is not a thing. For example, by making the
enclosure 21 longer than the enclosure 22, the audio output unit 10 is located above the center
by inverting the speaker system 2 located below the center of the audio output unit 10.
Configurations can also be adopted.
[0072]
(Reflector) Further, as shown in FIG. 9, the speaker system 2 ′ ′ according to the present
embodiment may further include a reflector 32. FIG. 9 is a view showing still another example of
the speaker system 2 ′ ′ according to the present embodiment. (A) of FIG. 9 shows an
overview of a speaker system 2 ′ ′ provided with a reflection plate 32, and (b) shows an
overview of a television 100 provided with the speaker system 2 ′ ′ shown in (a).
[0073]
As shown in (a) and (b) of FIG. 9, the speaker system 2 ′ ′ includes a reflector 32.
03-05-2019
19
[0074]
The reflecting plate 32 is provided in parallel with the audio output unit 10 of the speaker
system 2 ′ ′ (that is, in parallel with the longitudinal direction of the enclosures 21 and 22).
The reflection plate 32 can give a certain directivity to the speaker system 2 ′ ′ by reflecting
the sound output from the sound output unit 10.
[0075]
Also, as shown in FIG. 10, the reflecting plate 32 rotates around the sound output unit 10. FIG.
10 is a state transition diagram when the reflection plate 32 of the speaker system 2 ′ ′
according to the present embodiment is rotated. (A) of FIG. 10 shows a state in which the
reflection plate 32 is rotated clockwise, and (b) shows a state in which the reflection plate 32 is
rotated counterclockwise.
[0076]
As shown in (a) and (b) of FIG. 10, the reflecting plate 32 rotates clockwise or counterclockwise
around the audio output unit 10 of the speaker system 2 ′ ′. The reflecting plate 32 may have
a configuration in which the rotation range is limited, or may be capable of rotating 360 degrees
around the audio output unit 10 (the rotation range is not limited), and is not particularly limited.
[0077]
The reflector 32 can provide the speaker system 2 ′ ′ with a certain directivity, as described
above. Further, the reflecting plate 32 is rotatably provided centering on the audio output unit
10. Therefore, the speaker system 2 ′ ′ can easily adjust the transmission direction (radial
direction) of the sound output from the sound output unit 10 by rotating the reflection plate 32.
03-05-2019
20
[0078]
Thereby, the speaker system 2 ′ ′ including the reflection plate 32 forms a sound field in
which the sound output from the sound output unit 10 of the speaker system 2 ′ ′ can be
more easily heard according to the position of the user who uses the television 100. can do.
[0079]
Third Embodiment Next, a speaker system 3 according to still another embodiment of the
present invention will be described with reference to FIGS. 11 to 13.
Note that, for convenience of explanation, components having the same functions as those of the
speaker system 1 according to the first embodiment are given the same reference numerals, and
descriptions thereof will be omitted. In the present embodiment, differences from the first
embodiment will be mainly described.
[0080]
FIG. 11 is a diagram showing an example of the configuration of the speaker system 3 according
to the present embodiment. (A) of FIG. 11 is an exploded perspective view of the speaker system
3, and (b) is a cross-sectional view taken along the line C-C 'of (a).
[0081]
As shown in FIG. 11, the speaker system 3 according to the present embodiment includes the
bass reflex port (first bass amplification unit) 41 in the enclosure 21 and the bass reflex port
(second bass amplification unit) 42 in the enclosure 22. The configuration is the same as that of
the speaker system 1 according to the first embodiment except for the above. In FIG. 11, the
speaker net 14 is omitted for the sake of convenience.
[0082]
03-05-2019
21
(Bass reflex port) The bass reflex ports 41 and 42 have an amplification structure of the bass of
the voice for amplifying and outputting the bass of the sound generated from the rear surface of
the speakers 11 and 12 by Helmholtz resonance when outputting the voice. is there. As shown in
FIGS. 11A and 11B, the bass reflex port 41 is provided at one end of the sub enclosure 25 and at
one end different from the one connectable to the main enclosure 23. Also, the bass reflex port
42 is provided at one end of the sub enclosure 26 and at one end different from the one
connectable to the main enclosure 24.
[0083]
Further, as shown in FIGS. 11A and 11B, the bass reflex ports 41 and 42 are arranged to have a
symmetrical structure so as to cancel the reaction occurring at each bass reflex port at the time
of voice output. As described above, by arranging the bass reflex ports 41 and 42 so as to be
symmetrical, it is possible to cancel the vibrations generated at the bass reflex ports 41 and 42 to
each other. Therefore, the speaker system 3 can amplify the bass range of the sound output from
the speaker system 3 while suppressing the vibration of the entire speaker system 3.
[0084]
Furthermore, as long as the bass reflex ports 41 and 42 are disposed plane-symmetrically in the
speaker system 3, the arrangement positions thereof are not particularly limited. For example, as
shown in FIG. 12, the bass reflex port (first bass amplification unit) 43 and the bass reflex port
(second bass amplification unit) 44 may be disposed on the side surfaces of the sub enclosures
25 and 26.
[0085]
FIG. 12 is a view showing another example of the configuration of the speaker system 3
'according to the present embodiment. (A) of FIG. 12 is an exploded perspective view of the
speaker system 3 ', and (b) is a D-D' sectional view of (a). As shown in FIGS. 12A and 12B, the
bass reflex ports 43 and 44 are disposed on the side surfaces of the sub enclosures 25 and 26 so
as to have a symmetrical structure.
[0086]
03-05-2019
22
As described above, the bass reflex ports 41 and 42, 43 and 44 are arranged so as to have a
symmetrical structure that cancels the reaction occurring at each bass reflex port at the time of
voice output, thereby suppressing the vibration and suppressing the voice of the bass region. The
output direction of can be adjusted flexibly.
[0087]
(Passive Radiator) Furthermore, as shown in FIG. 13, the speaker system 3 ′ ′ according to the
present embodiment has a passive radiator (first A bass amplifier 45) and a passive radiator
(second bass amplifier) 46 may be provided.
FIG. 13 is a diagram showing still another example of the configuration of the speaker system 3
′ ′ according to the present embodiment. (A) of FIG. 13 is an exploded perspective view of the
speaker system 3 ′ ′, and (b) is a cross-sectional view taken along the line E-E ′ of (a).
[0088]
The speaker system 3 ′ ′ is provided with passive radiators 45 and 46, as shown in (a) and (b)
of FIG. The passive radiators 45 and 46 are provided at one end of the sub enclosures 25 and 26
at one end different from one end connectable to the main enclosures 23 and 24.
[0089]
Also, the passive radiators 45 and 46 are arranged in a symmetrical structure so as to cancel the
reaction that occurs in each passive radiator when outputting sound. Thus, the speaker system 3
′ ′ can amplify the bass range of the sound output from the speaker system 3 while
suppressing the vibration of the entire speaker system 3 ′ ′.
[0090]
Fourth Embodiment A speaker system 4 according to yet another embodiment of the present
invention will be described below with reference to FIGS. 14 to 18. The speaker system 4
03-05-2019
23
according to the present embodiment further includes a drive device 50. In the present
embodiment, although the case where the speaker system 4 includes the drive device 50 is
described as an example, the present invention is not limited to this. For example, the speaker
system 4 may be provided outside the speaker system 4.
[0091]
Note that, for convenience of explanation, components having the same functions as those of the
speaker system 1 according to the first embodiment are given the same reference numerals, and
descriptions thereof will be omitted. In the present embodiment, differences from the first
embodiment will be mainly described.
[0092]
Configuration of Drive Device First, a drive device (drive means) 50 according to the present
embodiment will be described with reference to FIG. FIG. 14 is a view showing the main
configuration of the drive device 50 according to the present embodiment.
[0093]
As shown in FIG. 14, the driving device 50 includes low pass filters (LPFs) 51 and 52, high pass
filters (HPFs) 53 and 54, amplifiers (AMPs) 55 and 56, adders 57 and 58, and a voice control
unit 59. Have. Further, to the driving device 50, two speakers 11 and a speaker 12, which are
disposed such that the audio output surfaces face each other, are connected. The LPF 51, the
HPF 53, the AMP 55, and the adder 57 perform processing on the sound output from the
speaker 11, and the LPF 52, the HPF 54, the AMP 56, and the adder 58 perform processing on
the sound output from the speaker 12.
[0094]
The driving device 50 receives an input of an audio signal indicating audio output from the
speaker 11 and the speaker 12. The driving device 50 supplies the input audio signals to the
LPFs 51 and 52 and the HPFs 53 and 54. The process performed by the drive device 50 on the
03-05-2019
24
sound output from the speaker 11 and the process related to the sound output from the speaker
12 are basically the same processes, and hence the processes related to the sound output from
the speaker 11 below. The process will be described.
[0095]
(LPF, HPF) The LPF 51 and the HPF 53 separate the audio signal input to the drive device 50
into an audio signal of low and middle frequency components and an audio signal of high
frequency component. Specifically, the LPF 51 separates the low and middle frequency
components of the voice signal by filtering the low and middle frequency components of the
voice signal (so-called low frequency filtering), and the HPF 53 filters the high frequency
component of the voice signal The high frequency components of the audio signal are separated
by (so-called high frequency filtering).
[0096]
In the present embodiment, the audio signal of the high frequency component is an audio signal
indicating audio having a frequency of 1.5 kHz to 20 kHz in the audible band, and the audio
signal of the low and middle frequency components is 1 in the audible band. An audio signal
representing audio having a frequency below 5 kHz. Therefore, in the present embodiment, the
LPF 51 is a filter that selectively passes an audio signal having a frequency of less than 1.5 kHz,
and the HPF 53 selectively passes audio having a frequency of 1.5 kHz to 20 kHz. It is a filter.
[0097]
The distinction between low and middle frequency components and high frequency components
by the above frequency does not limit the present invention. For example, in consideration of the
characteristics of the speaker used, the frequency at which the user does not feel uncomfortable
most is low or middle. You may select as a threshold value of a range component and a high
region component.
[0098]
The LPF 51 inputs the passed low and middle frequency component audio signal to the adder 57.
03-05-2019
25
On the other hand, the HPF 53 inputs the passed high frequency component audio signal to the
AMP 55.
[0099]
(AMP) The AMP 55 amplifies or attenuates the volume of the sound indicated by the input highfrequency component audio signal, and inputs it to the adder 57. The AMP 55 and the AMP 56
are controlled by the voice control unit 59, and determine the amplification factor of the volume
based on the control signal received from the voice control unit 59.
[0100]
(Audio Control Unit) The audio control unit 59 individually controls the amplification factor of
the volume of the audio indicated by the audio signal of the high frequency component by the
AMP 55 and the AMP 56. In particular, in the case of changing the localization of sound, the
AMP 55 and the AMP 56 are controlled so as to make the amplification rates of the AMP 55 and
the AMP 56 different from each other. The change of the localization of the sound will be
described later by changing the drawing.
[0101]
(Adder) The adder 57 adds the low and middle frequency component sound input from the LPF
51 and the high frequency component sound input from the AMP 55, and inputs the result to the
speaker 11. The speaker 11 outputs the sound indicated by the sound signal input from the
adder 57.
[0102]
The LPF 52, the HPF 54, the AMP 56, and the adder 58 perform the same process as the process
described above. The speaker 12 outputs the sound indicated by the sound signal input from the
adder 58 in the same manner as the speaker 11.
03-05-2019
26
[0103]
Of the sounds output from the speakers 11 and 12 by the driving device 50 as described above,
the low and middle range sounds are in-phase and have the same volume (same amplitude), so
the vibrations of the speakers are canceled can do. This is because the sound of low and middle
frequency components has a large influence on the vibration of the speakers 11 and 12, while
the sound of high frequency components has a small influence on the vibration of the speakers
11 and 12.
[0104]
Further, among the sounds output from the speakers 11 and 12, the sounds of high frequency
components are sounds that are in phase and different in volume (different in amplitude). By
controlling the volume ratio (amplitude ratio) of the high frequency component sound of the
sounds respectively output from the speakers 11 and 12, the speaker system 4 forms a sound
field in which the localization of the sound is changed up and down. be able to.
[0105]
The drive device 50 may be realized as a computer such as a digital signal processor (DSP). In
this case, an audio signal processing program that causes the computer to operate as the drive
device by causing the computer to function as the above means, and a recording medium
recording the program are also included in the scope of the present invention.
[0106]
[Formation of Sound Field] Subsequently, the principle of changing the sound field using the
speaker system 4 provided with the driving device 50 according to the present embodiment will
be described with reference to FIGS. 15 to 18. FIG. 15 is a diagram showing a change range of
localization of sound when the speaker system 4 according to the present embodiment is used.
FIG. 16 is a diagram showing a sound field in the case where the sounds respectively output from
the speakers 11 and 12 have the same volume in the speaker system 4 according to the present
03-05-2019
27
embodiment.
[0107]
Generally, detection of the sound in the vertical direction depends on the head-related transfer
function, so a sound field in which the sound is localized is formed at the position where the
sound of the high-frequency component whose head-related transfer function changes greatly is
output. For example, in the speaker system 4 according to the present embodiment, when the
same sound is output from the speakers 11 and 12, respectively, output from the speakers 11
and 12 on an equidistant plane (a plane including a broken line shown in FIG. 15). The phases of
each of the voices that have been Therefore, on the equidistant plane, superposition of the
sounds output from the speakers 11 and 12 occurs, and the volume (sound pressure) becomes
maximum. Therefore, a sound field in which sound is localized is formed on the equidistant plane.
[0108]
As described above, the sound field can be changed by controlling the volume ratio of the sounds
respectively output from the speakers 11 and 12. The distance between the upper and lower
speakers 11 and 12 is preferably selected to be about twice the diameter of the speakers 11 and
12.
[0109]
As shown in FIG. 16, in the case where the volume ratio of the high frequency component sound
of the sounds respectively output from the speakers 11 and 12 is 1: 1, the sound field in which
the sound is localized on the equidistant plane indicated by the broken line Is formed. When the
user listens to the sound output from the speaker 11, the direction of the sound felt by the user
is the direction indicated by the arrow A in FIG. Similarly, when listening to the sound output
from the speaker 12, the direction of the sound felt by the user is the direction indicated by the
arrow B in FIG.
[0110]
03-05-2019
28
Therefore, when sound is output in the same phase and volume from the speakers 11 and 12, the
direction of the sound felt by the user is the direction of the arrow C which is a composite vector
of the vectors indicated by the arrows A and B, ie, on the equidistant plane. It is a direction.
Further, on this equidistant plane, the sound outputted from the speakers 11 and 12 at the
volume of “1” becomes the volume of “2” by superposition as shown in FIG.
[0111]
(Change in Localization) Further, the speaker system 4 can change the localization of sound by
making the volumes of the sounds output from the speakers 11 and 12 different.
[0112]
However, when the sound volume ratio of the speakers 11 and 12 is simply changed to change
the localization of the sound, it is difficult to mutually cancel the vibrations of the speakers 11
and 12.
Therefore, in the present embodiment, as shown in FIG. 17, the audio output from the speakers
11 and 12 of the speaker system 4 with the drive device 50 is divided into low- and mid-range
component voices and high-range component voices. And change only the volume ratio of the
high frequency component.
[0113]
FIG. 17 is a diagram showing a sound field in the case where the volumes of sounds respectively
output from the speakers 11 and 12 are different in the speaker system 4 according to the
present embodiment.
[0114]
As shown in FIG. 17, when the sound volume ratio of the high frequency component sound of the
sounds respectively output from the speakers 11 and 12 is set to be 1.5: 0.5, the equal distance
indicated by the broken line A sound field in which sound is localized above the plane is formed.
03-05-2019
29
When listening to the sound output from the speaker 11, the direction of the sound felt by the
user is the direction shown by the arrow A 'in FIG. Similarly, when listening to the sound output
from the speaker 12, the direction of the sound felt by the user is the direction indicated by the
arrow B 'in FIG.
[0115]
Therefore, when voices of the same phase are output from the speakers 11 and 12 at different
volume levels, the direction of the sound felt by the user is the direction of the arrow C ′ which
is a composite vector of the vectors indicated by the arrows A ′ and B ′ The direction is closer
to the speaker 11 than the distance plane. At this time, on the equidistant plane, the sound of the
volume of “1.5” output from the speaker 11 and the sound of the volume of “0.5” output
from the speaker 12 are as shown in FIG. , Becomes a volume of "2" by superposition. Therefore,
the speaker system 4 can form a sound field in which the sound is localized upward while
suppressing the vibration of the speaker while the volume in the equidistant plane is
substantially constant.
[0116]
As described above, the voice control unit 59 controls the amplification factors of the AMP 55
and the AMP 56 so as to keep the volume in the equidistant plane substantially constant. For
example, in the case of localizing the sound further upward than the example shown in FIG. 17,
the amplification factor may be set so that the volume ratio of the high-frequency component
sound is 1.7: 0.3. Thus, the speaker system 4 can form a sound field in which the sound is
localized upward while the volume in the equidistant plane is substantially constant.
[0117]
Thereby, the speaker system 4 according to the present embodiment can change the localization
of sound while suppressing the vibrations of the speakers 11 and 12 by canceling each other. At
this time, the volume ratio is adjusted so that the volume at the middle point between the
speakers 11 and 12 does not change.
[0118]
03-05-2019
30
Further, in the case where the volume ratio of the high frequency component sound of the
sounds output from the speakers 11 and 12 is set to 2: 0, the position of the speaker 11, that is,
in the direction indicated by the arrow A in FIG. A sound field in which the sound is localized is
formed. Similarly, when the volume ratio of the high frequency component sound of the sounds
output from the speakers 11 and 12 is set to 0: 2, the position of the speaker 12, that is, the
direction indicated by the arrow B in FIG. A sound field in which the sound is localized is formed.
[0119]
FIG. 18 is a graph showing the characteristics of sound when the distance between the speakers
11 and 12 is changed in the speaker system 4 according to the present embodiment. The
horizontal axis of the graph is the frequency (unit: kHz), the vertical axis Is the sound pressure (in
dB). When the distance between the speakers 11 and 12 is set to 2 cm, 4 cm and 6 cm, the
characteristics of the sound measured on the equidistant plane are shown. As shown in FIG. 18,
particularly when the distance between the speakers is short, the dip (dip) in the high-frequency
component of the curve indicating the characteristic of the sound becomes large. Therefore, by
providing a certain distance between the speakers 11 and 12, better characteristics can be
obtained.
[0120]
As in the present embodiment, when the voice output surfaces of the speakers are arranged to
face each other, the high frequency component voices are low and mid frequency components on
the equidistant plane as compared with the conventional speaker system. It may be smaller than
the voice of This is because the voice of the high frequency component has high directivity and
straightness.
[0121]
However, the speaker system 4 according to the present embodiment can amplify the highfrequency component audio signal by providing the drive device 50. That is, since the speaker
system 4 according to the present embodiment can output the sound in which only the high
frequency component is amplified by the driving device 50, the frequency characteristic of the
03-05-2019
31
sound to be heard on the equidistant plane is made to be flatter Can.
[0122]
Therefore, the speaker system 4 according to the present embodiment needs to have additional
circuits and configurations in order to amplify only the voice of the high frequency component
which is considered to be heard smaller than the voice of the mid frequency component on the
equidistant plane. There is no
[0123]
As described above, by using the speaker system 4 according to the present embodiment, the
user may, for example, place the middle point between the speakers arranged such that the audio
output surfaces face each other, for example, at the center of the height of the TV screen. It can
be adjusted according to your preference.
In addition, even in the case where the speaker system 4 needs to be offset and disposed due to,
for example, the design, the sound can be localized at the center of the TV screen to form a sound
field.
[0124]
In the present embodiment, although the case where one speaker system 4 is driven by the
driving device 50 is described as an example, the present invention is not limited to this. Even if
the two speaker systems 4 are simultaneously driven by the driving device 50 Good.
Furthermore, the drive device 50 may drive so as to make the volume of the sound output from
the two speaker systems 4 different. In this case, it is preferable that the two speaker systems 4
be arranged such that the normal directions of the respective sound output surfaces are parallel.
[0125]
Thereby, the drive device 50 can change the localization of the sound also in the in-plane
direction perpendicular to the normal direction of the two speaker systems 4. That is, the drive
device 50 can change the localization of the sound in all directions by driving the two speaker
03-05-2019
32
systems 4 as described above.
[0126]
[Summary] The speaker system (speaker systems 1 to 4) according to one aspect of the present
invention is disposed at one end in the longitudinal direction of the first elongated enclosure
(enclosure 21) as described above, and an audio output surface (vibration A first speaker
(speaker 11) opposite to the first elongated enclosure, and a longitudinal end of a second
elongated enclosure (enclosure 22) A second speaker (speaker 12) whose audio output surface is
located on the opposite side of the second elongated enclosure, and the audio output surface of
the first speaker and the audio of the second speaker It is characterized in that it is disposed so
as to face the output surface.
[0127]
According to the above configuration, the first speaker and the second speaker are disposed to
face each other.
By this, it is possible to cancel the vibration generated when one speaker outputs a sound by the
vibration generated when the other facing speaker outputs a sound. Thus, the vibration of the
entire speaker system can be suppressed, so that the generation of vibration noise, chattering
noise, and the like due to the vibration of the first and second speakers can be suppressed.
[0128]
In addition, since the first and second elongated enclosures are elongated in shape, of the sound
output from one of the speakers, the sound whose propagation is inhibited by the other speaker
and the elongated enclosure Less is. This is because the sound output surfaces of the speakers
disposed at one longitudinal end of each elongated enclosure face each other, so the sound
output from one speaker is provided with the other speaker and the other speaker. This is
because it is not hindered except at one longitudinal end of each elongated enclosure.
[0129]
Therefore, the speaker system realizes a speaker system with low directivity with respect to the
angle between the longitudinal direction of the first and second elongated enclosures and the
03-05-2019
33
sound propagation direction (that is, the declination based on the longitudinal direction). can do.
[0130]
Further, in the speaker system according to an aspect of the present invention, the first speaker
and the second speaker may be connected by a plurality of rod-like members (connection bars
13).
[0131]
According to said structure, said 1st speaker and said 2nd speaker are connected by several rodshaped members.
By this, the sound which is output from the first and second speakers, and which is the sound
propagating in the direction perpendicular to the longitudinal direction of the speaker system,
the member connecting the first and second speakers It is possible to reduce the blockage of the
sound transmission.
This is because of the sound output from the first and second speakers than when the shape of
the member connecting the first and second speakers is a shape other than a rod (for example, a
plate). Because the amount of inhibition of transmission can be reduced.
[0132]
Therefore, the speaker system can reduce directivity in a direction perpendicular to the
longitudinal direction of the speaker system.
[0133]
Further, in the speaker system according to one aspect of the present invention, the distance
between the first speaker and the second speaker is equal to that of the diaphragm (vibration
plate 15) included in the first speaker and the second speaker. It may be more than the diameter.
[0134]
03-05-2019
34
According to the above configuration, the distance between the first speaker and the second
speaker is equal to or greater than the diameter of the diaphragm provided in the first speaker
and the second speaker.
Thereby, the speaker system efficiently suppresses the standing wave generated between the
first speaker and the second speaker by the sound output from both of the first and second
speakers. be able to.
[0135]
In the speaker system according to one aspect of the present invention, the first elongated
enclosure includes a first main enclosure (main enclosure 23) in which the first speaker is
disposed at one end in the longitudinal direction; And a second main enclosure (main enclosure
24) in which the second elongated enclosure is disposed at one end in the longitudinal direction.
And a second sub-enclosure (sub-enclosure 26).
[0136]
According to the above configuration, the first and second elongated enclosures are respectively
constituted by the first and second main enclosures and the first and second sub-enclosures.
Therefore, the speaker system can arbitrarily adjust the lengths of the first and second elongated
enclosures by arbitrarily adjusting the lengths of the first and second sub enclosures. is there.
[0137]
Therefore, in the speaker system, a position at which the first speaker and the second speaker
are disposed to face each other, that is, a position at which sound is output from the speaker
system is referred to as the first and second subs. It can be arbitrarily adjusted by the length of
the enclosure.
Thus, the speaker system can optimally adjust the position at which the sound is output, in
accordance with the use environment of the speaker system.
03-05-2019
35
[0138]
In the speaker system according to one aspect of the present invention, the first elongated
enclosure and the second elongated enclosure may be cylindrical.
[0139]
According to the above configuration, the first elongated enclosure and the second elongated
enclosure are tubular.
Thereby, the said speaker system can output the audio | voice output from the said speaker
system more uniformly. In addition, since both the first and second elongated enclosures are
cylindrical in the speaker system, it is possible to further reduce the obstruction to the sound
propagation by the first and second elongated enclosures.
[0140]
Further, in the speaker system according to one aspect of the present invention, the first speaker
and the second speaker are output from the first speaker and the second speaker at a position
where the first speaker and the second speaker are disposed to face each other. A reflector 32
that reflects the sound may be disposed parallel to the longitudinal direction of the first
elongated enclosure and the second elongated enclosure.
[0141]
According to the above configuration, by reflecting the sound output from the first and second
speakers by the reflection plate 32, it is possible to adjust the transmission direction of the
output sound.
Therefore, by adjusting the direction of the reflecting plate 32 according to the position of the
user, the speaker system can form a sound field in which the sound output from the speaker
system can be more easily heard.
03-05-2019
36
[0142]
Further, in the speaker system according to one aspect of the present invention, the first
elongated enclosure includes a first bass amplifier (a bass reflex port 41, 42) that amplifies low
frequency components of the sound output from the first speaker. 43, passive radiator 45), the
second elongated enclosure is a second bass amplifier (a bass reflex port 42, 44, passive radiator)
for amplifying the low frequency component of the sound outputted from the second speaker 46)
may be provided.
[0143]
According to the above configuration, the speaker system includes the bass amplifier in both the
first and second elongated enclosures.
By this, the said speaker system can amplify the low-pitch range of the audio | voice output from
the said speaker system, suppressing the vibration of the said whole speaker system.
[0144]
Further, the speaker system according to an aspect of the present invention is a driving unit that
drives so as to make the volume of the sound output from the first speaker different from the
volume of the sound output from the second speaker It is preferable that the drive device 50
(particularly, the sound control unit 59 included in the drive device 50) is provided.
[0145]
According to the above configuration, the drive means drives so as to make the volumes of the
sounds outputted from the first and second speakers different.
By this, the drive device can change the localization of sound even when the sound output
surfaces of the two speakers are arranged to face each other.
[0146]
Further, in the speaker system according to one aspect of the present invention, the driving unit
may include the volume of the high frequency component of the sound output from the first
03-05-2019
37
speaker and the high frequency component of the sound output from the second speaker It is
preferable to drive so as to make the sound volume different from
[0147]
According to the above configuration, the driving means drives so as to make only the volume of
the high frequency component sound different among the sounds outputted from the first and
second speakers, and the low frequency component and the mid frequency It drives so that the
volume of the audio | voice of a component becomes equal.
[0148]
Thereby, the driving means cancels the vibration of the second speaker by the low and middle
frequency component sound outputted from the first speaker, and the middle and low frequency
components outputted from the second speaker The sound of the speaker can cancel the
vibration of the first speaker.
Further, the drive device can change the localization by making the volume of the high frequency
component sound outputted from the first and second speakers different.
[0149]
Therefore, the drive means can change the localization while suppressing the vibration of the
first speaker and the second speaker.
[0150]
Further, in the speaker system according to one aspect of the present invention, the drive means
is a combination of the volume of the sound output from the first speaker and the volume of the
sound output from the second speaker. It is preferable to drive so as to be constant.
[0151]
According to the above configuration, the drive means makes the total distance of the voices
outputted from the first and second speakers constant, thereby making the planes equal in
distance from the first and second speakers The sound volume heard on the distance plane can
03-05-2019
38
be made substantially constant.
Thus, even when driving is performed so as to make the volumes of the sounds output from the
first and second speakers different, the driving means can hear on an equidistant plane by
making the sum of the volumes constant. The volume can be made approximately constant.
[0152]
As described above, the control method according to one aspect of the present invention is
disposed at one end in the longitudinal direction of the first elongated enclosure (enclosure 21),
and the sound output surface (surface provided with the diaphragm) is A first speaker (speaker
11) opposite to the first elongated enclosure and a longitudinal end of a second elongated
enclosure (enclosure 22), the audio output surface being the second said And a second speaker
(speaker 12) located on the opposite side to the elongated enclosure, and arranged so that the
audio output surface of the first speaker and the audio output surface of the second speaker face
each other. Control method of the speaker system (speaker systems 1 to 4), wherein the volume
of the sound outputted from the first speaker and the sound volume of the sound outputted from
the second speaker And a drive step of driving so as to vary the amount, it is characterized in
that.
[0153]
According to the above control method, the same effect as that of the above speaker system can
be obtained.
[0154]
In addition, a program for operating a computer as the speaker systems 1 to 4 according to an
aspect of the present invention, the program causing the computer to function as the abovedescribed means, and such a program is recorded. Computer readable recording media that are
also included within the scope of the present invention.
[0155]
The above-mentioned Patent Document 4 is a display device provided with a display screen and
speakers for high sound, medium sound and low sound, and the high sound speakers are
respectively at the left and right end portions of the display screen in the vertical direction. There
is disclosed a display device provided and provided with a bass speaker at the lower end of the
display screen.
03-05-2019
39
[0156]
However, in the technology described in Patent Document 4, changing the localization of sound
only with one set of high-tone, medium-tone and low-tone speakers (one each) provided on one
of the left and right of the display device I can not do it.
That is, the technology described in Patent Document 4 can change the localization of sound for
the first time by providing two high-pitched, medium-tone and low-pitched speakers provided on
the left and right of the display device. It is.
[0157]
Further, even if the volume of the two speakers for high sound is made different, the localization
of the sound in the short direction of the display screen is fixed to the position of the speaker for
high sound.
[0158]
On the other hand, in the drive device 50 according to one aspect of the present invention, as
described above, the audio output surface of the first speaker (speaker 11) and the audio output
surface of the second speaker (speaker 12) face each other. A drive system for driving the
speaker system 4 disposed in the control unit, the volume of sound output from the audio output
surface of the first speaker and the volume of sound output from the audio output surface of the
second speaker , And a driving unit (voice control unit 59) that drives to make them different.
[0159]
According to the above configuration, the drive means drives so as to make the volumes of the
sounds outputted from the first and second speakers whose sound output faces are arranged to
be different from each other.
Thereby, the drive device 50 can change the localization of the sound in the normal direction of
the sound output surface of the two speakers.
03-05-2019
40
That is, the drive device 50 can change the localization of the sound with only one speaker
system by differentiating the volume of the sound output from the two speakers whose sound
output surfaces face each other.
[0160]
In addition, for example, the drive device 50 is all prepared by preparing two speaker systems
and arranging the short direction of the display device parallel to the normal direction of the
sound output surface on the left and right of the display device. It is possible to change the
localization of the voice relative to the direction.
[0161]
Finally, the audio control unit 59 included in the drive device 50 for controlling the speaker
system 1 may be realized in hardware by a logic circuit formed on an integrated circuit (IC chip).
, And may be realized as software using a CPU (Central Processing Unit).
[0162]
In the latter case, the voice control unit 59 is a CPU that executes instructions of a program for
realizing each function, a ROM (Read Only Memory) storing the program, a RAM (Random Access
Memory) expanding the program, the program and A storage device (recording medium) such as
a memory for storing various data is provided.
Then, the object of the present invention is a recording medium in which the program code (the
executable program, the intermediate code program, the source program) of the control program
of the voice control unit 59 which is software that realizes the functions described above is
readable by computer. This can also be achieved by supplying the voice control unit 59 and the
computer (or CPU or MPU) reading out and executing the program code recorded in the
recording medium.
[0163]
Examples of the recording medium include non-transitory tangible media such as tapes such as
magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks /
hard disks, and CD-ROM / MO. Disks including optical disks such as / MD / DVD / CD-R, IC cards
(including memory cards) / cards such as optical cards, semiconductor memories such as mask
ROM / EPROM / EEPROM (registered trademark) / flash ROM Alternatively, logic circuits such as
03-05-2019
41
a programmable logic device (PLD) or a field programmable gate array (FPGA) can be used.
[0164]
Further, the voice control unit 59 may be configured to be connectable to a communication
network, and the program code may be supplied via the communication network.
This communication network is not particularly limited as long as the program code can be
transmitted.
For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network,
Virtual Private Network, telephone network, mobile communication network, satellite
communication network, etc. can be used.
Also, the transmission medium that constitutes this communication network may be any medium
that can transmit the program code, and is not limited to a specific configuration or type.
For example, even if wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone
line, ADSL (Asymmetric Digital Subscriber Line) line, infrared such as IrDA or remote control,
Bluetooth (registered trademark), IEEE 802.11 wireless, HDR ( It can also be used wirelessly such
as High Data Rate), Near Field Communication (NFC), Digital Living Network Alliance (DLNA),
mobile phone network, satellite link, terrestrial digital network and the like.
The present invention can also be realized in the form of a computer data signal embedded in a
carrier wave, in which the program code is embodied by electronic transmission.
[0165]
It should be understood that the embodiments disclosed herein are illustrative and nonrestrictive in every respect.
03-05-2019
42
The scope of the present invention is indicated not by the above description but by the claims,
and is intended to include all modifications within the meaning and scope equivalent to the
claims.
[0166]
The speaker system of the present invention can be suitably applied to a speaker built in or
externally attached to a television receiver, an AV amplifier, a CD player or the like.
[0167]
DESCRIPTION OF SYMBOLS 1 speaker system 10 audio | voice output part 11 speaker (1st
speaker) 12 speaker (2nd speaker) 13 connection stick | rod (rod-shaped member) 14 speaker
net 15 diaphragm 21 enclosure (1st elongate enclosure) 22 enclosure (the 1st 2 elongated
enclosures 23 main enclosure (first main enclosure) 24 main enclosure (second main enclosure)
25 sub enclosure (first sub enclosure) 26 sub enclosure (second sub enclosure) 31 mounting
portion 32 Reflectors 41, 43 Bass reflex port (first bass amplifier) 42, 44 Bass reflex port (second
bass amplifier) 45 Passive radiator (first bass amplifier) 46 Passive radiator (second bass
amplifier) 5 Drive (driving means) 51,52 LPF 53,54 HPF 55,56 AMP 57,58 adder 59 voice
control unit
03-05-2019
43
Документ
Категория
Без категории
Просмотров
0
Размер файла
60 Кб
Теги
jp2014107751
1/--страниц
Пожаловаться на содержимое документа