JPH0690491A - Noise cut-off type microphone device - Google Patents

Abstract

PURPOSE:To make it possible to always exert a stable and clear sound characteristic without imparting sense of incongruity or pains to a user by facilitating the loading and unloading without damaging adhesion by making a specific microphone element the ear pad of a headphone set. CONSTITUTION:A microphone element 4 composed of pressure sensitive conductive gum which detects a sound signal transmitting by vocalization and converting the signal into an electric signal is installed within the ear cup A 3a of a headphone set 1 forming coating sheet 6 by silicon gum, etc. By adjusting and mounting an adjusting mechanism 2, the element 4 is made contact to the surrounding of an ear, the element 4 detects the voice by vocalization as a resistance change by defining it as bone conductive vibration, the voice is converted and amplified to an electric signal in a prescribed signal detection amplifier circuit, and it is connected with a radio communication device, etc., via a cord 7 and a plug 8. Therefore, the device has a constitution that the headphone set 1 and a microphone are integrated into one body, and the imparting of physiological incongruity and pains to a user is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise insulation type microphone device used for a wireless communication device, a wired communication device and the like under noise.

[0002]

2. Description of the Related Art Conventional noise blocking microphones include a throat microphone, a bone conduction microphone, an ear canal mylophone, etc. These generally pick up ambient noise in addition to voice at places where noise is generated. Because it is difficult to make clear calls, for example, guidance work at noisy airfields, various construction sites, factories, conversational communication in aircraft, vehicles and ships, underwater communication, and during traffic control It is very widely used with earphones and headphone sets when the microphone cannot be held due to the use of guided conversation and the use of both hands.

In such a conventional noise-blocking microphone, a microphone detects vocal cord vibration generated by utterance, bone-conducted vibration conducted by utterance, and ear-hole vibration caused by utterance, and converts it into an electric signal. This noise blocking microphone includes a vibrating member that transmits the vibration of the user's voice and a microphone element that captures the vibration transmitted from the vibrating member and converts the vibration into an electric signal. From the viewpoints of stability of vibration transmitted to the element, stability of sensitivity, good frequency characteristics, etc., the adhesion of the noise blocking microphone to each contact portion of the user is extremely important.

In order to maintain the above-mentioned adhesion, the conventional method for holding a noise-blocking microphone at each contact site requires that a neck band, a headband, etc. be used to closely contact each user contact site. The elasticity of the neckband, headband, etc., which is the holding device for the noise blocking microphone of the above, must be strengthened, and as a result, each contact part of the user is strongly pressed, and the user feels physiologically uncomfortable. And feel even pain when used for a long time,
It was the actual state of the conventional noise-blocking microphone that makes it difficult to attach and detach.

[0005]

DISCLOSURE OF THE INVENTION As mentioned above,
The conventional noise-blocking microphone has a problem that it causes a physiological discomfort to the user, and even causes pain when it is used for a long time, making it difficult to put on and take off the device.

[0006] The present invention is a noise insulation type microphone that does not impair the adhesion of the noise insulation type microphone, facilitates attachment / detachment, and does not give a feeling of discomfort or pain to the user, and always exhibits stable and clear voice characteristics. It is intended to provide a microphone device.

[0007]

In order to achieve the above object, the microphone element made of the pressure-sensitive conductive rubber of the present invention is characterized in that it is easy to cut out, cut, and attach, and has a shape, a length and the like. It can be processed freely, and since no mechanical parts are used, there are few failures, and durability and reliability can be improved.

Further, by using a metal foil electrode, a flat braided wire electrode, a wire mesh electrode, a film electrode or the like as the electrode, it is possible to have a high sensitivity and durability, and to be flexible and flexible.

Further, by covering the microphone element with silicon rubber or the like, it is possible to construct a microphone element which is excellent in weather resistance and heat resistance, and is also excellent in waterproofness, dustproofness, oil resistance and surface slipperiness.

By using the microphone element as an ear pad of a headphone set, a structure in which the headphone set and the microphone are integrated can be realized, and the user can easily put on and take off the clothes without causing physiological discomfort or pain. A noise blocking microphone device can be provided.

[0011]

With the above-described structure, the neckband, headband, etc. of the conventional noise-blocking microphone can be eliminated, the user's discomfort and discomfort can be eased, and the attachment / detachment can be easily performed. Will be able to. In addition, the wearing adjustment mechanism of the headphone set has an effect of maintaining an appropriate wearing position of the noise blocking microphone device of the present invention to the user and an appropriate adhesion.

[0012]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the microphone element (4) is covered with a silicone rubber or the like to form a covering sheet (6), which is attached to the ear cup A (3a) of the headphone set (1). As a result, an ear pad incorporating the microphone element (4) is constructed instead of the conventional ear pad (5). By adjusting and mounting the adjusting mechanism (2) of the headphone set device, the microphone element (4) is brought into close contact with the periphery of the ear, and the voice produced by the vocalization is detected as bone conduction vibration and the microphone element (4) is detected as a resistance change. Then, Fig. 7
The signal detection / amplification circuit shown as an example converts and amplifies into an electric signal, and is connected to a wireless communication device, a wired communication device, etc. through the cord (7) and the plug (8).

In FIG. 2, a microphone element (4)
Is coated with silicone rubber or the like to form a covering sheet (6) and attached to the ear cup A (3a) and ear cup B (3b) of the headphone set (1). As a result, the area of the contact area of the microphone element (4) with the audio conduction area increases, and the sensitivity of audio detection can be increased.

In FIG. 3, the noise blocking microphone device of the present invention can be easily mounted by mounting the microphone element (4) formed on the cover sheet (6) of silicon rubber or the like on the ear pad of the existing headphone set. Can be

In FIG. 4, the microphone element (4) formed on the cover sheet (6) with silicon rubber or the like can be easily attached to the throat and the like together with a shirt, tie and the like to easily form a throat microphone device. . Further, the bone conduction microphone device can be easily provided by mounting it on the head together with a helmet or the like.

FIG. 5 is a sectional view showing an example of the structure of the double-sided electrode of the microphone element (4). The electrode A (11a) and the electrode B are shown in FIG.
When the pressure-sensitive conductive rubber (13) is constructed in a sandwich shape between (11b) and voice vibration is applied to the pressure-sensitive conductive rubber (13), a corresponding change in resistance value appears between the electrodes. This microphone element resistance (Rx) value is detected and amplified by the detection / amplification circuit shown in FIG. 7 and output as an audio signal. Further, by adopting a metal foil electrode, a film-shaped electrode, a flat braided wire electrode, a wire mesh electrode or the like as the electrode, it is possible to construct a flexible and flexible microphone element (4).

FIG. 6 is a top view showing a constitutional example of a single-sided electrode of the microphone element (4). By arranging a metal foil electrode or a film-shaped electrode in a comb shape as an electrode material, the electrode interval is narrowed and the sensitivity is increased. I can do things. In addition, it is possible to construct a flexible and flexible microphone element.

FIG. 7 shows an example of a signal detection / amplification circuit, in which voice vibration of the pressure-sensitive conductive rubber (13) appears between the electrodes as a change in the resistance (Rx) of the microphone element and is amplified, and a direct current is output from the capacitor (C) as a voice signal. The component is cut and only the AC component is output.

[0019]

Since the present invention is configured as described above, a device having an integrated ear pad and head set having a novel function in which the ear pad itself of the head set serves as a microphone element is obtained. Thus, when used as an individual headphone set and a noise insulation type microphone of the prior art, it is easy to put on and take off without giving the user a feeling of discomfort or discomfort, and it is possible to exert a stable and clear voice characteristic at all times. .

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a noise insulation type microphone device of the present invention.

FIG. 2 is a front view showing an embodiment of the noise blocking microphone device of the present invention.

FIG. 3 is a front view showing an embodiment of the noise blocking microphone device of the present invention.

FIG. 4 is a side view showing an embodiment of the noise blocking microphone element of the present invention together with the mounted state.

FIG. 5 is a cross-sectional view showing an embodiment of the electrode configuration of the noise blocking microphone device of the present invention.

FIG. 6 is a top view showing an embodiment of the electrode configuration of the noise blocking microphone device of the present invention.

FIG. 7 is a circuit diagram showing an embodiment of an amplifier circuit of the noise blocking microphone device of the present invention.

[Explanation of symbols]

 1 Headphone Set 2 Adjust Mechanism 3a Ear Cup A 3b Ear Cup B 4 Microphone Element 5 Ear Pad 6 Cover Sheet 7 Cord 8 Plug 9 Tie 10 Shirt 11a Electrode A 11b Electrode B 12a Lead Wire A 12b Lead Wire B 13 Pressure Sensitive Conductive Rubber Ra Fixed resistor Rb Fixed resistor Rx Microphone element resistance C Condenser A Amplifier

Claims (1)

[Claims] 1. A voice signal conducted by utterance is detected,
A noise insulation type microphone device characterized in that a microphone element (4) made of pressure-sensitive conductive rubber for converting into an electric signal is used as an ear pad of a headphone set (1).