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DESCRIPTION JPH0690491

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DESCRIPTION JPH0690491
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
noise cut-off type microphone device used for a wireless communication device, a wire
communication device, etc. under noise.
[0002]
2. Description of the Related Art Conventional noise shut-off microphones include throat
microphones, bone conduction microphones, ear canal microphones, etc. These pick up ambient
noise in addition to voice in places where noise is generally generated. When it is difficult to
make clear calls because it is difficult to communicate, for example, at an aerodrome with a lot of
noise, guidance work at various construction sites, factories, etc., conversation communication in
aircraft, vehicles, ships etc., underwater communication, and traffic control It is very widely used
with ear phones and headphone sets, etc., as well as with guided conversations and when the
microphone can not be gripped due to the use of both hands.
[0003]
Such a conventional noise blocking type microphone is such that the microphone detects a vocal
cord vibration generated by vocalization, a bone conduction vibration conducted by vocalization,
and an earlobe vibration generated by vocalization, and converts it into an electric signal.
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Important components of this noise blocking microphone are the vibrating member that
transmits the vibration of the user's voice and the microphone element that captures the
vibration transmitted from the vibrating member and converts it into an electrical signal. The
adhesion of the noise blocking microphone to each contact portion of the user is extremely
important from the viewpoint of the stability of the vibration transmitted to the element, the
stability of sensitivity, the goodness of the frequency characteristics, and the like.
[0004]
In order to maintain the adhesion mentioned above, it is necessary to closely hold each contact
area of the user by using a neck band, a head band, etc. in order to maintain the adhesion
mentioned above. The elasticity of the neckband and headband, which are the holding devices of
the microphone, must be made strong, and as a result, each contact site of the user is strongly
compressed, giving the user physiological discomfort. Also, when used for a long time, etc., even
the pain is felt, and it is the reality of the conventional noise blocking type microphone that it
causes difficulty in attachment and detachment.
[0005]
SUMMARY OF THE INVENTION As described above, the conventional noise blocking microphone
gives the user a physiological sense of discomfort, and even when it is used for a long time, it
makes even a pain felt, making it difficult to attach or detach. Also had problems such as causing
difficulties.
[0006]
The present invention makes it easy to attach and detach without impairing the adhesion of the
noise blocking microphone, and to provide a noise blocking microphone device that always
exhibits stable and clear voice characteristics without giving a sense of discomfort or pain to the
user. It is intended to be provided.
[0007]
[Means for Solving the Problems] In order to achieve the above problems, the microphone
element made of pressure-sensitive conductive rubber according to the present invention has a
shape, a length, etc., taking advantage of its ease of cutting, cutting, pasting, etc. Since it can be
freely processed and mechanical parts are not used, there are few failures, and durability and
reliability can be improved.
[0008]
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In addition, by using a metal foil electrode, a flat braided wire electrode, a wire mesh electrode, a
film-like electrode or the like as the electrode, the sensitivity, the durability and the flexibility can
be enhanced.
[0009]
Furthermore, by coating the microphone element with silicone rubber or the like, it is possible to
construct a microphone element that is excellent in weather resistance and heat resistance, and
excellent in water resistance, dust resistance, oil resistance, and surface lubricity.
[0010]
By using the microphone element as the ear pad of the headphone set, the headphone set and the
microphone can be integrated, and noise blocking that is easy to attach and detach without
giving a user physiological discomfort or pain. Type microphone device can be provided.
[0011]
Operation As described above, the neckband, headband, etc. of the conventional noise cut-off
microphone become unnecessary, so that the user's discomfort and pain can be alleviated, and
attachment / detachment can be easily performed. Will be able to
In addition, the mounting adjustment mechanism of the headphone set has an effect of
maintaining an appropriate mounting position and appropriate adhesion to the user of the noise
blocking microphone device of the present invention.
[0012]
Embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, the microphone element (4) is coated with silicone rubber or the like to form a cover
sheet (6), and is attached to the ear cup A (3a) of the headphone set (1).
As a result, in place of the conventional ear pad (5), an ear pad incorporating a microphone
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element (4) is constructed.
By adjusting and mounting the adjustment mechanism (2) of the headphone set device, the
microphone element (4) is closely attached to the periphery of the ear, and the voice due to
speech is detected as a bone conduction vibration as the resistance change of the microphone
element (4). Then, the signal detection and amplification circuit shown as an example in FIG. 7
converts and amplifies an electric signal, and is connected to a wireless communication device, a
wired communication device, etc. through the code (7) and the plug (8).
[0013]
In FIG. 2, the microphone element (4) is coated with silicone rubber or the like to form a cover
sheet (6) and attached to the ear cup A (3a) and the ear cup B (3b) of the headphone set (1).
Due to this, the contact site area of the microphone element (4) to the voice conduction site is
increased, and the sensitivity of voice detection can be increased.
[0014]
In FIG. 3, the noise blocking type microphone device of the present invention can be easily
obtained by mounting the microphone element (4) formed on the covering sheet (6) with silicone
rubber or the like on the ear pad of the existing headphone set. Can do.
[0015]
In FIG. 4, the throat microphone device can be easily obtained by mounting the microphone
element (4) formed on the cover sheet with silicone rubber or the like on the throat portion or
the like together with a shirt, tie or the like.
In addition, the bone conduction microphone device can be easily obtained by attaching it to the
head together with a helmet or the like.
[0016]
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FIG. 5 is a cross-sectional view showing a configuration example of the double-sided electrode of
the microphone element (4), in which a pressure sensitive conductive rubber (13) is constructed
in a sandwich between the electrode A (11a) and the electrode B (11b) Is applied to the pressure
sensitive conductive rubber (13), and a corresponding change in resistance appears between the
electrodes.
The microphone element resistance (Rx) value is detected and amplified by the detection
amplification circuit shown in FIG. 7 and is output as an audio signal.
Further, by adopting a metal foil electrode, a film-like electrode, a flat braided wire electrode, a
wire mesh electrode or the like as the electrode, a flexible flexible microphone element (4) can be
constructed.
[0017]
FIG. 6 is a top view showing a configuration example of a single-sided electrode of the
microphone element (4). By arranging a metal foil electrode and a film-like electrode on the
electrode material in a comb shape, the electrode spacing becomes narrow and sensitivity can be
increased. . Also, a flexible flexible microphone element can be constructed.
[0018]
FIG. 7 shows an example of a signal detection and amplification circuit. Voice vibration appears
in the pressure sensitive conductive rubber (13) as a change in microphone element resistance
(Rx) between the electrodes and is amplified, and DC component is cut off by a capacitor (C) as a
voice signal. Only the AC component is output.
[0019]
As the present invention is configured as described above, it is possible to obtain a device in
which an ear pad having a novel function in which the ear pad of the headphone set itself
becomes a microphone element and the headphone set are integrated. Therefore, it can be easily
attached and detached without giving discomfort or feeling of discomfort to the user when it is
used as an individual headphone set and noise blocking microphone according to the prior art,
and has an effect of exhibiting stable and clear audio characteristics. .
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