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JP2007208734

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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
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DESCRIPTION JP2007208734
[PROBLEMS] To obtain a sound image having a feeling of spread over the entire pipe (cylindrical
member). A speaker device 100A includes a pipe 102 and a speaker unit 103. One end side and
the other end side of the pipe 102 are in an open state. A unit 103 driven based on the audio
signal is coaxially disposed at one end of the pipe 102. The pipe 102 is formed light and thin
enough to be excited by the sound wave from the unit 103. The sound wave SWB from the unit
103 is radiated from the other end of the pipe 102 through the inside of the pipe 102 to the
outside, at which time the pipe wall of the pipe 102 is vibrated by the sound wave SWB and
vibrates. A sound wave SWS corresponding to the audio signal is emitted from the entire outer
surface of 102. [Selected figure] Figure 5
Speaker apparatus and audio output method
[0001]
The present invention relates to a speaker device and an audio output method. Specifically, the
present invention excites the tube wall of the cylindrical member by the sound wave from the
sounding body driven based on the audio signal, and radiates the sound wave to the outside from
the entire outer surface of the cylindrical member. However, the present invention relates to a
speaker device and an audio output method in which uniform sound pressure is felt at each
position in the longitudinal direction of the cylindrical member, and a sound image having a
feeling of spread over the entire cylindrical member can be obtained.
[0002]
03-05-2019
1
Conventionally, as described in, for example, Patent Document 1, a nondirectional speaker device
in which a speaker unit is coaxially disposed on one end side of a cylindrical member (pipe)
whose one end side and the other end side are open has been proposed. There is. The speaker
device of this type has an effect that the tubular member functions as a resonance tube and the
low frequency component can be enhanced.
[0003]
JP 2001-224089 A
[0004]
In the speaker apparatus as described in the above-mentioned patent documents 1, the sound
wave obtained from a speaker unit is emitted outside only from the one end side and the other
end side of this cylindrical member.
Therefore, the sound image is localized to the end portion of the cylindrical member, and it is
difficult to obtain a sound image having a feeling of spread over the entire cylindrical member.
[0005]
An object of the present invention is to provide a speaker device capable of obtaining a sound
image having a sense of spread over the entire tubular member.
[0006]
The concept of the present invention is as follows: a cylindrical member whose one end and the
other end are open, a sound generator which is disposed coaxially with the cylindrical member
on one end of the cylindrical member and is driven based on an audio signal The tube wall of the
tubular member is vibrated by the sound wave obtained from the sounding body and passing
through the inside of the tubular member, and the sound wave corresponding to the audio signal
from the entire outer surface of the tubular member to the outside The speaker apparatus is
characterized in that
[0007]
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2
In the present invention, the speaker device includes the tubular member and the sound
generator.
One end side and the other end side of the cylindrical member are in an open state.
The sounding body is driven based on the audio signal. The sounding body is coaxially disposed
on one end side of the cylindrical member, so that the sound wave obtained from the sounding
body passes through the inside of the cylindrical member and is radiated to the outside from the
other end side of the cylindrical member. Thereby, this cylindrical member functions as a
resonance pipe, and enhancement of the low range component is achieved.
[0008]
Further, the tube wall of the tubular member is vibrated by the sound wave passing through the
inside of the tubular member. That is, the tube wall of the cylindrical member is made light and
thin enough to be excited by sound waves (rough air density). Due to such vibration by the sound
wave, a sound wave corresponding to the sound signal related to the driving of the abovementioned sounding body is emitted from the entire outer surface of the cylindrical member to
the outside. As a result, the user can feel uniform sound pressure at each position in the
longitudinal direction of the tubular member, and can obtain a sound image having a sense of
spread over the entire tubular member.
[0009]
For example, the diameter of the tubular member is gradually increased in the direction in which
the sound wave from the sounding body travels. As a result, since the electric inductance
component is increased, the flattening effect of the frequency characteristic and the damping
effect of the resonance can be obtained, and since the outlet from which the sound wave is
emitted becomes wide, the effect of increasing the sense of spreading of the sound image is
obtained. .
[0010]
03-05-2019
3
According to the present invention, the tube wall of the cylindrical member is vibrated by the
sound wave from the sounding body driven based on the voice signal, and the sound wave is
emitted to the outside from the entire outer surface of the cylindrical member. However, a
uniform sound pressure can be felt at each position in the longitudinal direction of the tubular
member, and a sound image having a sense of spread over the entire tubular member can be
obtained.
[0011]
An embodiment of the present invention will be described.
1 to 4 show the configuration of a speaker device 100A as an embodiment. 1 is a perspective
view of the speaker device 100A, FIG. 2 is a longitudinal sectional view of the speaker device
100A, FIG. 3 is a top view of the speaker device 100A, and FIG. 4 is a bottom view of the speaker
device 100A.
[0012]
The speaker device 100A includes a base housing 101, a pipe 102 as a cylindrical member, and a
speaker unit 103 using an electrodynamic actuator as a sound generator.
[0013]
The base housing 101 is formed of, for example, a synthetic resin.
The base housing 101 is formed in a disk shape as a whole, and an opening 104 penetrating in a
cylindrical shape is provided at the central portion thereof. A predetermined number of, in this
embodiment, three leg portions 105 are planted at equal angular intervals along the outer
peripheral side of the lower surface of the base housing 101.
[0014]
When the number of the legs 105 is three, the three legs 106 are always in contact with the
03-05-2019
4
installation surface, so that stable installation is possible as compared with, for example, four
legs. Further, by providing the leg portion 105 on the lower surface of the base housing 101, the
lower surface of the base housing 101 can be separated from the installation surface, and the
sound wave from the speaker unit 103 attached to the lower surface side of the base housing
101. Can be emitted to the outside from the lower surface side.
[0015]
The pipe 102 is light and thin enough to be excited by the sound wave from the speaker unit
103. For example, this pipe 102 is made of polycarbonate as a material, and its thickness is 0.5
mm. The pipe 102 is open at one end and the other end. A lower end portion which is an end
portion on one end side of the pipe 102 is fixed to the upper surface of the above-described base
housing 101 using, for example, an adhesive.
[0016]
In order to function as a resonance tube, the pipe 102 has a diameter substantially the same as
the diameter of the opening 104 formed in the base housing 101 and is fixed in a state of being
aligned with the opening 104 It is done.
[0017]
The speaker unit 103 is attached at a position corresponding to the opening 104 on the lower
surface side of the base housing 101 with, for example, a screw (not shown) with the front
surface facing downward.
The speaker unit 103 is arranged coaxially with the pipe 102. The speaker unit 103 is driven
based on an audio signal obtained from, for example, a CD player, a DVD player or the like.
[0018]
The sound wave of normal phase outputted from the front surface of the speaker unit 103 is
radiated to the outside from the lower surface side of the base casing 101. Also, sound waves of
reverse phase output from the back surface of the speaker unit 103 are radiated from the upper
03-05-2019
5
end side of the pipe 102 to the outside through the opening 104 and the inside of the pipe 102.
[0019]
The operation of the speaker device 100A shown in FIGS. 1 to 4 will be described.
[0020]
The speaker unit 103 attached to the lower surface side of the base housing 101 is driven based
on an audio signal obtained from a CD player, a DVD player or the like as described above, and a
sound wave of normal phase corresponding to the audio signal is driven from the front surface.
Is obtained, and the sound wave of the opposite phase corresponding to the audio signal is
obtained from the back.
[0021]
The sound wave SWF obtained from the front surface of the speaker unit 103 is emitted to the
outside from the lower surface side of the base housing 101, as shown in FIG.
Further, as shown in FIG. 5, the sound wave SWB obtained from the rear surface of the speaker
unit 104 is radiated from the upper end side of the pipe 102 to the outside through the inside of
the opening 104 and the pipe 102.
In this case, the pipe 102 functions as a resonance tube to enhance the low frequency
component.
[0022]
Further, as described above, since the pipe 102 is light and thin enough to be vibrated by the
sound wave, the pipe wall of the pipe 102 is vibrated by the sound wave (rough air density) SWB
passing therethrough. Due to such vibration by the sound wave, the pipe wall of the pipe 102
vibrates in response to the sound wave SWB, and as shown in FIG. 5, the above-mentioned
speaker unit 104 is driven from the entire outer surface of the pipe 102 to the outside. A sound
wave SWS corresponding to the audio signal according to is emitted.
03-05-2019
6
[0023]
According to the speaker device 100A shown in FIGS. 1 to 4, the sound wave from the speaker
unit 103 driven based on the audio signal excites the tube wall of the pipe 102, and the speaker
unit is externally output from the entire outer surface of the pipe 102 Since the sound wave SWS
related to the drive of 103 is configured to be emitted, the user feels uniform sound pressure at
each position in the longitudinal direction of the pipe 102 and obtains a sound image having a
sense of spreading to the entire pipe 102. it can.
[0024]
Moreover, since the pipe 102 is opened not only at the one end side where the speaker unit 103
is disposed but also at the other end side, the pipe 102 functions as a resonance pipe, and the
enhancement effect of the low frequency component is exhibited. Therefore, the sound wave
SWS emitted from the entire outer surface of the pipe 102 is also enhanced in the low range, and
the user can obtain a good sound output.
[0025]
Next, another embodiment of the present invention will be described.
FIG. 6 shows the configuration of the speaker device 100B according to the embodiment.
FIG. 6 shows a perspective view of the speaker device 100B. In FIG. 6, parts corresponding to
FIG. 1 are given the same reference numerals, and the detailed description thereof will be
omitted.
[0026]
In this speaker device 100B, a pipe 102B is provided instead of the pipe 102 in the speaker
device 100A shown in FIG. The diameter of the pipe 102B is gradually increased in the direction
in which the sound wave from the speaker unit 103 travels (the upper side in the drawing).
[0027]
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7
The other components of the speaker device 100B are configured in the same manner as the
speaker device 100A shown in FIG. The speaker device 100B operates in the same manner as the
speaker device 100A shown in FIG.
[0028]
According to this speaker device 100B, in addition to the same effects as those of the abovedescribed speaker device 100A, the following effects can also be obtained. That is, since the
diameter of the pipe 102B is gradually increased in the direction in which the sound wave from
the speaker unit 103 travels, the electrical inductance component is increased. Further, since the
sound wave is emitted from a wide outlet, there is an effect that the spread of the sound image is
increased.
[0029]
In the above embodiment, the speaker unit 103 using an electrodynamic actuator is used as a
sounding body (transducer). However, the speaker using the other actuators such as a
magnetostrictive actuator or a piezoelectric actuator may be used. It is also good.
[0030]
The present invention can obtain a sound image having a sense of spread over the entire pipe
(cylindrical member), and can be applied to a speaker device or the like in an audio visual device.
[0031]
It is a perspective view which shows the structure of the speaker apparatus 100A as
embodiment.
It is a longitudinal cross-sectional view which shows the structure of the speaker apparatus 100A
as embodiment.
It is a top view which shows the structure of the speaker apparatus 100A as embodiment. It is a
03-05-2019
8
bottom view which shows the structure of the speaker apparatus 100A as embodiment. It is a
figure for demonstrating radiation | emission of the sound wave from the whole outer surface of
a pipe. It is a perspective view which shows the structure of the speaker apparatus 100B as
embodiment.
Explanation of sign
[0032]
DESCRIPTION OF SYMBOLS 100A, 100B ... Speaker apparatus, 101 ... Base housing | casing 102,
102B ... Pipe, 103 ... Speaker unit, 104 ... Opening part, 105 ... Leg part
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