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JP2010263295

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DESCRIPTION JP2010263295
The present invention provides a speaker device capable of realistically reproducing a sound field
by reducing the adverse effect of synthesized sound from left and right speakers in a stereo
device. A speaker device 1 according to the present invention includes a pair of middle highpitched sound speakers 13a and 13b for left channel and right channel disposed adjacent to each
other in one case 3, and a left channel and a right channel. A middle to high tone signal
processing means for storing a pair of high tone speakers 11a and 11b for the right channel and
outputting middle to high tone speakers 13a and 13b, and high tone speakers 11a and 11b A
treble signal processing means is housed. A real sound field can be reproduced by installing and
using the speaker device 1 at the center of the left and right main speakers of the stereo device.
[Selected figure] Figure 3
Speaker apparatus and sound reproduction method
[0001]
The present invention relates to a speaker device and a sound reproducing method for
reproducing an acoustic field realistically by reducing the adverse effect of synthesized sound
from left and right main speakers in a stereo device.
[0002]
All sounds emitted from raw instruments are expressed as respiratory waves (spherical waves),
and air is vibrated around the instrument as central axis, and sound is diffused and transmitted
as compression waves in all directions. .
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However, if you play on a stereo device, even if you are playing solo with one instrument, the
axes of the sound source will be two left and right, and the sounds transmitted from there will be
combined, and the original position of the instrument will be a synthesized sound from the left
and right Although the sound image is reproduced as one, the synthesized sound different in the
direction of transmission is to be heard with a low degree of perfection where the images are
connected and localized. Its biggest fate is to reproduce it with two speakers on the left and right,
and if it is one, even if it has only one sound source like a solo instrument, the sound like a
finished instrument will be reproduced more realistically, It must be assumed other than solo
performance, and if it is not reproduced with at least 2 or more speakers, monaural (one) can not
obtain three-dimensional feeling and realism, and perspective expression such as musical
instruments It becomes impossible to clearly reproduce the size of the recording room and the
positional relationship of each instrument. As described above, in the conventional stereo device,
it was not possible to hear a realistic sound.
[0003]
With regard to stereo devices, stereo devices have been proposed which can obtain an
appropriate surround feeling at a listening position or enjoy natural stereo feeling. In particular,
various techniques have been proposed for audio devices including in-vehicle audio devices. For
example, in the interior space of a car where a car audio system is used, it is difficult to create an
ideal sound field such as music output by the car audio system due to the influence of the shape
of the room space, seat etc. Audio that provides an ideal sound field at the listening position by
generating correction data for correcting audio data in advance from output data and
measurement data, and correcting the audio data based on the correction data There is an
apparatus (see, for example, Patent Document 1).
[0004]
Further, among audio devices, there is also a multi-channel audio system which aims to
physically reproduce in space the sound field itself in which the original sound source existed. A
multi-channel audio system utilizes wavefront synthesis technology, and a listener can enjoy a
realistic sound by outputting sound from an array speaker consisting of a plurality of speakers
(for example, Patent Document 2) reference).
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[0005]
JP 2007-124327 A JP JP 2008-147839 A
[0006]
The stereo device and audio device which can enjoy natural feeling or realism, which has been
proposed up to now, have a delay circuit to delay the sound signal, to change the phase, to
change the sound pressure level in each frequency band In order to improve the sense of
naturalness or presence, basically, by electrically adjusting and changing the sound signal
electrically, such as those to be Such a method is to electrically manipulate the sound signal in
the former to produce an unusual sound and improve the stereo feeling, and in the latter, the
effect that the speaker device of the present invention is to improve Rather than trying to get the
effect, but trying to get the effect of multi-channel.
Therefore, it is hard to say that any method has natural and real feeling sufficiently improved.
Further, in the case of using the method of electrically adjusting and changing the sound signal,
the configuration of the control circuit and the like tends to be complicated. It is needless to say
that it is preferable to improve the naturalness and realism of a stereo device with a simple and
inexpensive device.
[0007]
An object of the present invention is to provide a speaker device and a sound reproducing
method capable of reproducing a sound field realistically by reducing the adverse effect of
synthesized sound from left and right main speakers in a stereo device.
[0008]
Humans first determine where the sound comes from or what it sounds from by the direct sound
(attack sound) that reaches the ear.
If this attack sound is not reproduced correctly and becomes dull, important information such as
where the sound is coming from or what the sound is from will be lost, and it will not be possible
to judge the information correctly . The inventor found that the lack of realism in the
conventional stereo device is due to the fact that this attack sound and the subsequent indirect
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sound are not correctly reproduced, and this attack sound and the subsequent indirect sound It
has been found that a realistic sound field can be reproduced by correct improvement, and the
present invention has been completed. By accurately reproducing the attack sound with the
speaker device of the present invention, it is also possible to reproduce the indirect sound
correctly in the result with the existing stereo device. The present invention is as follows.
[0009]
The present invention according to claim 1 is a speaker device installed and used at the center of
left and right main speakers of a stereo device, wherein a pair of middle high-pitched speakers
for left channel and right channel arranged to be adjacent to each other. And low and high
frequency sound signal processing means capable of cutting low frequency components
respectively from input signals of left and right channels and outputting respective high and high
frequency components.
[0010]
According to a second aspect of the present invention, there is provided the speaker apparatus
according to the first aspect, further comprising: a left channel and a right channel disposed in
the center of the pair of middle high-pitched speakers adjacent to the middle-high-pitched
speakers And a high-pitched signal processing unit capable of cutting low- and middle-frequency
components from the input signal of each of the left and right channels and outputting the highfrequency component.
[0011]
According to a third aspect of the present invention, there is provided the speaker apparatus
according to the first or second aspect, further comprising: volume control capable of adjusting a
sound pressure level of a signal output from the middle to high tone signal processing means and
the high tone signal processing means. Characterized in that it comprises means.
[0012]
According to a fourth aspect of the present invention, there is provided the speaker apparatus
according to any one of the first to third aspects, wherein the mid-high-pitched speaker, the highpitched loudspeaker, the mid-high-pitched signal processing means, the high-pitched signal
processing means, and A volume control means is housed in one case.
[0013]
According to the present invention, the left and right main speakers are disposed adjacent to
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each other at the center of the left and right main speakers of the stereo device, and the left and
right main speakers are arranged from the left and right main speakers. A sound reproducing
method is characterized in that sounds of right channels are output, and sounds of middle to
treble of each of left and right channels are output from the middle to high tone speaker.
[0014]
By installing the speaker device according to the present invention at the center of the left and
right main speakers of the stereo device, the sounds emitted from the center speaker device are
added to the sounds emitted from the left and right main speakers, and these sounds are
Combined, the whole becomes a transmission state closer to one large respiratory wave
(spherical wave).
As a result, it is possible to reproduce a correct tone and reproduce a sound that is natural and
excellent in realism.
In particular, in the speaker device, low frequency components are cut and only middle and high
frequency components are output, so it is possible to reproduce a sound that is not easily
influenced by the room and is excellent in naturalness and realism.
[0015]
BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the speaker apparatus 1 as 1st
embodiment of this invention.
It is a schematic diagram for demonstrating arrangement | positioning of the speaker of the
speaker apparatus 1 as 1st embodiment of this invention.
It is a block diagram which shows the structure of the speaker apparatus 1 as 1st embodiment of
this invention.
It is a figure for demonstrating the usage example of the speaker apparatus 1 as 1st embodiment
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of this invention. It is a figure for demonstrating the effect of the speaker apparatus 1 as 1st
embodiment of this invention.
[0016]
FIG. 1 is an external view of the speaker device 1 according to the first embodiment of the
present invention, FIG. 2 is a schematic view for explaining the arrangement of the speakers of
the speaker device 1, and FIG. It is a block diagram shown.
[0017]
The speaker device 1 is a device installed at the center of the left and right main speakers of the
stereo device to reduce the adverse effect of synthesized sound from the left and right main
speakers and reproduce the sound field realistically. A supply speaker comprising a pair of highpitched speakers 11 and a pair of middle-high-pitched speakers 13 and a network unit for
outputting a signal to the supply loudspeakers are provided inside.
[0018]
The housing 3 fixes and accommodates the speakers, and accommodates a network for
outputting signals to be sent to the high-tone speaker 11 and the middle-high-tone speaker 13
inside.
The housing 3 has a curved front surface 5 and is provided with an opening 7 for attaching four
speakers.
Each speaker is attached at a position slightly recessed from the wall surface of the front face
portion 5, and a trumpet shaped wall surface 9 is provided from the front surface of each
speaker toward the opening 7. The width of the case 3 is narrower toward the rear. The shape of
the housing 3 is not particularly limited to this shape, and the size is not limited to a specific size.
However, it is important that the four speakers be arranged adjacent to one another.
[0019]
The pair of high-pitched speakers 11 is a speaker for outputting high-pitched sound, and is
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vertically disposed at the center of the housing 3, and the high-pitched loudspeakers 11a
disposed at the top are disposed for the right channel and lowly. The speaker 11 b is for the left
channel, and the two high-pitched speakers 11 are arranged adjacent to each other. The highpitched speaker 11a disposed on the upper side may be used for the left channel, and the highpitched speaker 11b disposed on the lower side may be used for the right channel. The treble
speaker 11a for the right channel faces 15 to 25 degrees rightward in plan view as shown by α1
in FIG. 2 and the treble speaker 11b for the left channel is 15 in plan view as shown by α2 in
FIG. The two high-pitched speakers 11a and 11b are arranged so as to intersect each other in the
plan view, facing the left direction by 25 degrees. Although the installation angle in planar view
of these two high-pitched speakers 11 is not necessarily limited to this angle, by installing at
such an angle, it is preferable that the sound spreads. In side view, the two high-pitched speakers
11a and 11b are vertically installed.
[0020]
The pair of middle-high-pitched speakers 13 is a speaker for outputting middle-high-pitched
sounds, and the speaker disposed on the left of the middle high-pitched speaker 11 in the front
view is for the right channel. The speaker arranged next to it is for the left channel. The middlehigh-pitched speaker 13a for the right channel is directed leftward by 35 to 45 degrees in plan
view as indicated by α3 in FIG. 2 (a), and the speaker 13b for the left channel is indicated by α4
in FIG. 2 (a) As in the plan view, it is turned to the right by 35 to 45 degrees. Further, as shown
by β1 in FIG. 2B, the two middle high-pitched speakers 13 are installed upward at an angle of
60 to 70 degrees with respect to the horizontal plane in a side view. Although the installation
angle of these two middle high-pitched speakers 13 is not necessarily limited to this angle, the
installation at such an angle creates a spread in the sound, which is preferable.
[0021]
The network unit is connected to the thresholding device, cuts low to middle frequency
components from the input signal, and outputs high frequency components from the network 15
(15a, 15b) which is high-tone signal processing means, and connecting to the thresholding
device, the input signal is low A network 17 (17a, 17b) which is a medium-to-high-pitched signal
processing unit that cuts frequency components and outputs middle-to-high frequency
components and an attenuator 19 (a volume control device that can be connected to the
networks 15 and 17 to adjust sound pressure levels) 19a, 19b), 21 (21a, 21b).
[0022]
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The networks 15a and 15b are known networks, are connected to a stereo device, cut low- and
middle-frequency components of the left and right channels, and output high-frequency
components of the left and right channels.
The frequency to cut is a frequency less than 10 KHz.
[0023]
The networks 17a and 17b are also known networks, are connected to a stereo device, cut the
low frequency components of the left channel and the right channel, and output medium and
high frequency components of the left channel and the right channel. The frequency to cut can
be less than 3.5 KHz. By setting the frequency to be cut to less than 3.5 KHz, it is possible to
output using a commercially available general-purpose speaker, and the speaker device 1 can be
manufactured inexpensively. The frequency to cut may be less than 5 to 6 KHz.
[0024]
The attenuators 19 and 21 are known attenuators and can be connected to the networks 15 and
17 to adjust the sound pressure level of the signals output from the networks 15 and 17. The
attenuators 19a and 19b connected to the two networks 15a and 15b are simultaneously
variable in one volume (not shown). Similarly, the attenuators 21a and 21b connected to the two
networks 17a and 17b are simultaneously variable with another volume (not shown). The sound
pressure level of the signal output to the high-pitched speaker 11 or the middle-high-pitched
speaker 13 may be a sound pressure level of -6 to -16 dB as compared to the sound pressure
level of the left and right main speakers of the stereo device. The speaker device 1 only needs to
improve the attack sound, and does not necessarily require a large volume.
[0025]
Next, a usage example of the speaker device 1 will be described. FIG. 4 is a view for explaining an
example of use of the speaker device 1. Moreover, FIG. 5 is a figure for demonstrating the effect
of the speaker apparatus 1. FIG. 4 (a) and 5 are plan views, and FIG. 4 (b) is a side view. Although
FIGS. 4 and 5 illustrate the speaker device 1 in a simplified manner in order to explain an
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example of use and effects of the speaker device 1, the configuration of the speaker device 1 is
the same as the speaker of FIGS. 1 to 3. Device 1 is the same. Also, in FIG. 4 and FIG. 5, not all
things are necessarily drawn to the same scale.
[0026]
The speaker device 1 is installed and used at the following position. It is important to install the
speaker device 1 at the center of the left and right main speakers 31a and 31b of the stereo
device or the audio device in plan view. In the speaker device 1, the distance between the
listening position 33 and the point L1 on the listening position side 50 mm from the line
connecting the front center of the left and right main speakers 31a and 31b to the line
connecting the front center of the left and right main speakers 31a and 31b It is preferable to
install between the point L2 of 1/2. In FIG. 4A, this area is indicated by hatching. The installation
in the height direction of the speaker device 1 is preferably performed as follows. The line
connecting the height of the person's ear positioned at the listening position 33 shown in FIG. 4B
and the front center of the speaker device 1 forms an angle β2 of 0 to -40 degrees with respect
to the horizontal plane including the person's ear. A range is preferred. The speaker device 1 is
installed at the same position as or lower than the height of the ear of the person located at the
listening position 33. On the other hand, if the vertical and horizontal connections of the speaker
device 1 are reversed, the speaker device 1 can be installed at the same height as or higher than
the height of the ear of the person positioned at the listening position 33. The angle β2 formed
by the line connecting the height of the person's ear positioned at the listening position 33
shown in (b) and the center of the front of the speaker device 1 with respect to the horizontal
plane including the person's ear is preferably in the range of 0 to +40 degrees . By thus installing
the speaker device 1 and listening to the sound at the listening position 33 which is the center of
the left and right main speakers 31a and 31b, it is possible to hear a sound excellent in
naturalness and realism.
[0027]
FIG. 5A shows a waveform when the speaker device 1 is installed at the center of the left and
right main speakers 31a and 31b of the stereo device and sound is output. When the speaker
device 1 is installed as described above and the sound is reproduced by the stereo device, the
sound emitted from the pair of left and right main speakers 31a and 31b of the stereo device
shown by the broken line in FIG. In 5 (a), the sound emitted from the central speaker device 1
indicated by a solid line is added, and these sounds are synthesized, and the whole becomes a
transmission state closer to one large respiratory wave (spherical wave) I understand that On the
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other hand, FIG. 5 (b) is a transmission state of sound when the stereo device outputs sound in a
state where the speaker device 1 is not installed, and the sound is the first at the central position
of the left and right main speakers 31a and 31b. It is understood that it has arrived late.
[0028]
In the speaker device 1, the sound of the low frequency component is cut and the sound of the
middle to high range is output, but the high sound is shifted and easily attached to the ear, and
the low sound has a time difference, a distance difference, and a volume Even if there is a
difference, since one wavelength is long, the synthetic shift in the bass is not a big problem. If all
the sounds of low, middle, and high frequency components are output similarly to the main
speakers 31a and 31b without cutting the sound of the low frequency components, the low
frequency is excessive.
[0029]
As described above, by using the speaker device 1 according to the present invention, the attack
sound can be improved and the sound field can be reproduced realistically. Generally speaking,
putting the speakers of the same sound source side by side in addition to the left and right main
speakers 31a and 31b of the stereo device produces good results in the same action as blurring
the sound or adding artificial sounds. It is imagined that this is not possible, but this way of
improving something that is originally delayed is very effective if it is not overkill. When
experiments were actually performed using a prototype, good results were obtained. Since the
original synthetic sound, the distance difference between the left and right, and the time
difference between the left and right are significantly improved, the effect of listening to the
leading sound field of the respiratory wave, not the synthetic sound, is produced. Therefore, the
effect of reducing the adverse effect of the synthetic sound from the left and right main speakers
31a, 31b becomes remarkable. Further, the speaker device 1 according to the present invention
has a simple configuration as described using the embodiment, and can be manufactured
inexpensively.
[0030]
Although the example which accommodates a pair of high-pitched speaker 11 and a pair of
middle-high-pitched speaker 13 in one case 3 was shown in the above-mentioned embodiment, it
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is not necessary to necessarily install the above-mentioned speaker in one case 3. What is
important is that the high-pitched speaker 11 and the mid-high-pitched speaker 13 are disposed
adjacent to each other. Moreover, although the example which equips the speaker apparatus 1
with a pair of high-pitched speaker 11 and a pair of medium-high-pitched speaker 13 was shown
in the said embodiment, only a pair of medium-high-pitched speaker 13 may be sufficient. Even
when only one pair of middle high-pitched speakers 13 is used, it is important that the pair of
speakers be adjacent to each other. When a stereo device is used in a large venue, it is preferable
that the speaker device 1 includes not only the high / high-pitched speaker 13 but the highpitched speaker 11, but the high-pitched speaker 11 is necessarily required in home use. is not.
Further, in the speaker device 1, when outputting sounds in the middle to high range or high
ranges, it is important to output the sounds of the left and right channels from separate speakers,
and the sounds of the left and right channels are one When it is made to output with a speaker, it
is not possible to obtain natural sense of reality.
[0031]
Reference Signs List 1 speaker device 3 housing 5 front surface 7 opening 9 wall surface 11 11a,
11b high-pitched speaker 13 13a, 13b medium-high-pitched speaker 15 15a, 15b network 17
17a, 17b network 19 19a, 19b attenuator 21 21a, 21b attenuator 31a, 31b Main speaker 33
listening position
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