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JPH1155777

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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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH1155777
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
sound collector that can be used to amplify and listen to external sound in a constant frequency
band.
[0002]
2. Description of the Related Art Conventionally, acoustic devices such as disk recording and
reproducing devices and tape recorders are provided with a speaker device provided in the
device body, and are configured to listen to reproduction sound radiated from the speaker device.
[0003]
When a plurality of people listen to the reproduced sound emitted from such a speaker device,
one person can listen to the sound volume with an appropriate volume, but another person may
lack the volume.
[0004]
In addition, depending on the place where the audio equipment is installed, there may be
installed equipment that generates noise such as an air conditioner.
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If such noise is superimposed on the reproduced sound from the audio device, it becomes
impossible to listen to the desired reproduced sound with a good sound quality.
[0005]
Furthermore, even in a lecture hall, a theater, etc., there is a case where a certain person does not
have enough volume, and it is sometimes difficult to sufficiently listen to the voices of the
speaker and the actor.
[0006]
SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a
sound collector which makes it possible to remove noise and to reliably listen to the desired
sound.
[0007]
Another object of the present invention is to provide a sound collector capable of absorbing a
difference in listening ability and reliably listening to a desired sound.
[0008]
Furthermore, an object of the present invention is to provide a sound collector that can reliably
hear human voice without being affected by noise.
[0009]
SUMMARY OF THE INVENTION A sound collector according to the present invention proposed to
achieve the above-mentioned object has a method of collecting external sound through a
headband mounted on a head. By providing the first and second microphone units and the first
and second speaker units that amplify and emit the external sound collected by the microphone
units, the external sound can be enhanced and listened.
[0010]
Also, by providing the ear pads on the auricle contact surface side of the housing containing the
first and second speaker units, it is possible to block external sound and listen to only the sound
emitted from each speaker unit.
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2
[0011]
Furthermore, the first and second speaker units are not affected by noise by amplifying and
reproducing the sound in the vicinity of approximately 2 kHz to 3 kHz of the sound collected by
the first and second microphone units. It makes it possible to listen to human voice reliably.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION A sound collector according to the present
invention will be described below with reference to the drawings.
[0013]
The sound collector according to the present invention, as shown in FIG. 1, includes a headband
1 which is curved along the outline of the head mounted on the head.
The headband 1 is configured by using an elastically displaceable thin plate-like synthetic resin
body or a plate spring.
In the headband 1 using a leaf spring, the headband 1 is covered with a covering made of a
synthetic resin or the like.
[0014]
First and second hangers 2 and 3 are connected to each end of the headband 1.
As shown in FIG. 2, these hangers 2 and 3 have a hanger main body 6 provided with a storage
portion 5 sufficient for storing the printed wiring board 4 and other electronic components
inside, and an opening of the hanger main body 6. The cover member 7 to be covered is
integrally connected
[0015]
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3
The first and second microphone units 8 and 9 are disposed in the first and second hangers 2
and 3, respectively.
When the first and second microphone units 8 and 9 are equipped with the sound collector
according to the present invention on the head, the first and second microphone units 8 and 9
can collect the sound incident on the auricle in the vicinity of the auricle. The first and second
hangers 2 and 3 are disposed in the first and second hangers 2 and 3, and as shown in FIG. It is
located and attached to the outer surface side of the connection part vicinity.
[0016]
As the first and second microphone units 8 and 9 used here, those having unidirectionality are
used, and for example, microphone units having sound collection characteristics as shown in FIG.
3 are used.
That is, the first and second speaker units 2 and 3 exhibit a sound collection characteristic as
shown by F1 in FIG. 3 at a frequency of 500 Hz and a sound collection characteristic as shown by
F2 in FIG. 3 at a frequency of 1 kHz. It shows a sound collection characteristic as shown by F3 in
FIG. 3 at a frequency of 5 Hz.
And the 1st and 2nd speaker units 8 and 9 which have unidirectionality are attached to the 1st
and 2nd hanger parts 2 and 3 so that sound collection side 9a may turn to the front of a head.
[0017]
Here, the attachment state of the first and second microphone units 8 and 9 to the hangers 2 and
3 will be described.
Since the first and second microphone units 8 and 9 are attached to the hangers 2 and 3 with the
same configuration, the second microphone unit 9 side will be described as an example.
The second microphone unit 9 is mounted on the microphone support plate 12 disposed on the
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4
microphone mounting portion 11 formed on the outer surface side of the cover member 7
constituting the second hanger portion 3, and the microphone mounting portion It is supported
by the microphone holder 13 attached to 11 and attached to the outer surface side of the cover
member 7.
At this time, the second microphone unit 9 has the cylindrical elastic member 14 fitted on the
outer peripheral side, and is fitted to the fitting recess 12 a formed in the microphone support
plate 12 through the elastic member 14. Thus, when the sound collector according to the present
invention is mounted on the head, the mounting direction is positioned so that the sound
collecting surface 9a faces the front of the head.
[0018]
The elastic member 14 also has a function of damping so that the vibration transmitted through
the headband 1 and the first and second hangers 2 and 3 is not transmitted to the first and
second microphone units 8 and 9.
[0019]
Further, on the inner side surface side of the microphone holder 13, a microphone pressing plate
15 is disposed.
The mounting direction of the second microphone unit 9 is positioned and fitted to the
microphone support plate 12, and the microphone position plate is positioned by being pressed
and supported by the microphone holding plate 15, and the second microphone unit 9 is
attached to the second hanger portion 3 .
[0020]
The microphone holder 13 has a back surface facing the sound collecting surface 9a and the
sound collecting surface 9a of the first and second microphone units 8 and 9 attached to the first
and second hangers 2 and 3, respectively. The sound collectors 17 and 18 are opened in the part
to be. The microphone screen 19 provided with a large number of small holes so as to prevent
the entry of dust into the microphone holder 13 is provided on the sound collection ports 17 and
18. Are disposed to cover the sound collectors 17 and 18.
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5
[0021]
Further, an external connection cord 21 is drawn out from the first and second microphone units
8 and 9. The external connection cord 21 is extended into the hanger main body 6 through the
cord extraction hole 22 formed in the microphone attachment portion 11, and the printed wiring
board 4 disposed in the hanger main body 6 on the second hanger portion 3 side. It is connected
to the configured microphone amplifier. The connection cord 21 pulled out from the first
microphone unit 8 disposed on the first hanger 2 side is inserted into the headband 1 and pulled
out to the second hanger portion 3 side, and is printed on the printed wiring board 4 Connected
[0022]
First and second housings 24 and 25 containing the first and second speaker units 22 and 23 are
supported on the tip end sides of the first and second hangers 2 and 3. The first and second
housings 24 and 25 are disposed to face each other on the inner surface side of the curved
headband 1, and the pivoting portions 26 provided on the back surface side are divided into first
and second hanger portions 2 and 3 respectively. It is pivotally supported on the tip end side of
the and is rotatably supported centering on the pivot portion 26.
[0023]
The first and second speaker units 22 and 23 are accommodated in the first and second housings
24 and 25, respectively. Each of the first and second speaker units 22 and 23 has its sound
emitting surface 27 directed to the front side of the respective housings 24 and 25, and the
magnetic circuit unit 28 fitted in the respective housings 24 and 25. , 25 housed. Between the
first and second housings 24 and 25 and the first and second speaker units 22 and 23, first and
second buffer members 29 and 30 formed of elastic members are interposed, and a head is
formed. Damping is performed so that vibrations transmitted through the band 1 and the first
and second hangers 2 and 3 are not transmitted to the first and second speaker units 22 and 23.
A speaker screen 31 is disposed on the front side of the first and second housings 24 and 25 so
as to cover the sound emitting surface 27 side of the first and second speaker units 22 and 23.
The speaker screen 31 protects the diaphragm positioned on the sound emitting surface 27 side
of the first and second speaker units 22 and 23, and also removes dust from the first and second
speaker units 22 and 23. It is intended to prevent intrusion and is formed by a thin metal plate
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provided with a large number of small holes.
[0024]
And, on the auricle contact surface side of the first and second housings 24 and 25, that is, the
surface side on which the sound emitting surface 27 of the first and second speaker units 22 and
23 faces, the head of the sound collector is An ear pad 32 is provided to cover the pinna when
worn. The ear pad 32 is formed by forming a flexible material such as urethane foam having a
sound absorbing effect in a ring shape, and surrounds the sound emitting surface 27 of the first
and second speaker units 22 and 23 to form the first and second ear pads 32. The second
housings 24 and 25 are joined and disposed on the auricle contact surface side. In addition, the
flexible material which comprises the ear pad 32 is covered by outer skins, such as a synthetic
leather.
[0025]
By providing a ring-shaped ear pad 32 having a sound absorbing effect on the auricle contact
surface side of the first and second housings 24 and 25, when the sound collector is mounted on
the head, the auricle is provided by the ear pad 32. By being enclosed, the incidence of external
sound on the pinnacle is blocked or attenuated.
[0026]
In addition, the first hanger unit 2 includes a battery storage unit for storing a battery D serving
as a power source for driving the first and second microphone units 8 and 9 and the first and
second speaker units 22 and 23. 35 are provided.
The mounting and demounting of the battery D to and from the battery storage unit 35 is
performed via the battery mounting and dismounting opening 37 which is opened and closed by
the open / close lid 36. The power from the battery D stored in the battery storage unit 35 is
connected to the first and second microphone units 8 and 9 and the first and second speaker
units 22 via the connection cord extended in the headband 1. , 23 are supplied.
[0027]
On the other hand, on the second hanger 3 side, a power switch 37, a power display 38
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comprising light emitting elements such as light emitting diodes, and a volume adjustment
button 39 for adjusting the output of the first and second microphone units 8 and 9. Is provided.
[0028]
A suspender 41 is provided on the inner peripheral side of the headband 1 and extends between
the first and second hangers 2 and 3. The suspender 41 includes first and second hangers 2, 2, It
is telescopically attached between the three, and it expands and contracts to fit the size of the
user's head to achieve a stable wearing condition.
[0029]
When the sound collector configured as described above is mounted on the head with the left
and right auricles covered by the ear pads 32, the first and second microphone units 8 and 9
head the sound collecting surface 9a. It is located in the vicinity of the pinnae with its front
facing.
The acoustic signals collected by the first and second microphone units 8 and 9 are amplified by
the microphone amplifiers 45 and 46 formed on the printed wiring board 4 as shown in FIG. 4 to
adjust the output of the acoustic signals. Are supplied to the power amplifiers 50 and 51 via the
volumes 48 and 49, amplified by the power amplifiers 50 and 51, and supplied to the first and
second speaker units 22 and 23, and the first and second speakers are provided. The units 22
and 23 are driven.
The radiated reproduction sound from which the first and second speaker units 22 and 23 are
driven is radiated to a region surrounded by the ear pad 32 and is incident upon the pinna to
perform listening.
[0030]
The microphone amplifiers 45 and 46 for amplifying the acoustic signals from the first and
second microphone units 8 and 9 supplied to the first and second speaker units 22 and 23 have
a frequency band in the vicinity of approximately 2 kHz to 3 kHz. Is amplified to attenuate the
acoustic signal in a frequency band of about 500 Hz or less. With the microphone amplifiers 45
and 46 having such an amplification function, the sound pressure frequency characteristics of
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the first and second speaker units 22 and 23 are, as shown in FIG. The sound pressure level in
the frequency band near 2 KHz to 3 kHz is enhanced, and the sound pressure level in the
frequency band below 500 Hz, such as noise from falling foreign particles and noise from air
conditioners, is reduced, and the frequency band intended for listening Can be enhanced to
listen.
[0031]
In addition, the frequency band which enhances the sound pressure level of an acoustic signal, or
the frequency band to reduce is suitably selected according to the objective of using a sound
collector.
[0032]
As described above, the sound collector according to the present invention comprises the first
and second microphone units for collecting external sound through the headband mounted on
the head, and these microphone units The first and second speaker units are provided to amplify
and emit external sound collected by the speaker, and it is possible to enhance the external
sound and to listen, thereby absorbing the difference in listening ability and desired sound You
can listen to
[0033]
And, since the ear pad covering the pinna is provided on the auricle contact surface side of the
housing containing the first and second speaker units, the noise directly input to the pinna is
blocked and affected by the noise Desired sound such as human voice can be reliably heard
without.
[0034]
Brief description of the drawings
[0035]
1 is a perspective view showing a sound collector according to the present invention.
[0036]
2 is an exploded perspective view of the sound collector viewed from the back side.
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[0037]
3 is a characteristic diagram showing the sound collection characteristics of the microphone unit
used in the sound collector according to the present invention.
[0038]
4 is a block circuit diagram of a sound collector according to the present invention.
[0039]
5 is a characteristic diagram showing the sound pressure frequency characteristics of the
speaker unit according to the present invention.
[0040]
Explanation of sign
[0041]
1 head band, 2 first hanger section, 3 second hanger section, 8 first microphone unit, 9 second
microphone unit, 22 first speaker unit, 23 second speaker unit, 32 ear pads.
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