JP2997903B2 - Voice collection method in the ear canal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting sound in an ear canal, and more particularly to an improvement in a technique for collecting sound generated in the throat by a microhorn inserted into the ear canal. .

[0002]

2. Description of the Related Art A conventional voice collecting method generally uses a microphone placed face-to-face with a speaker.
In this case, not only the generated sound but also the noise generated in the surroundings are collected together (pickup).
When used in a noisy environment, there is a drawback that essential voices cannot be collected cleanly, that is, noise is mixed into original voices.

Therefore, instead of such an external sound collecting method, a sound collecting technique in the external auditory canal has been developed in which the sound emitted in the throat is collected by a microhorn inserted into the external auditory canal. For example, JP-A-56-15239
No. 6 and Japanese Utility Model Laid-Open No. 57-78183 are proposals of this type.

[0004] In each of these prior arts, the vibration of the otona around the external auditory canal due to the sound generated in the throat is sensed by a metal piece inserted into the external auditory canal and in contact with the external ear wall near the ear bone. Yes, a contact trapping system based on bone conduction. Compared to the conventional collection method using a microphone placed facing the mouth of a speaker, there is an advantage that the degree of picking up noise generated in the surroundings is small because the sound is collected in the ear canal.

[0005]

However, in the case of the above-described prior art of the bone conduction method, the metal piece as the sensing end is in contact with the otella through the outer ear wall, so that the surrounding area is hard to reach. There is a problem that generated noise cannot be completely cut off. For example, when a speaker speaks while walking, shoe noises and the like generated by the walking (that is, noise generated in the surroundings) cause vibration of the ear bones, so that noise is also picked up. In addition, the impact sound when the work helmet or the like worn by the generator hits another object is also picked up as vibration of the ear bone.

Further, although the external auditory canal itself is closed by the inserted microhorn and the metal piece for vibration collection, when noise of 90 horn or more is generated around the speaker, the ear of the speaker reacts to the noise. As the bone oscillates, the metal pieces will also pick up noise through this oscillation.

SUMMARY OF THE INVENTION In view of the circumstances of the prior art, it is an object of the present invention to completely block ambient noise when voice is collected in an ear canal and to avoid mixing of the original voice and noise. .

[0008]

According to the present invention, a vibration sound transmitted to the eardrum by a sound generated in the throat is collected by a microhorn inserted into an external auditory canal and connected to the microhorn. The gist is to input the audio signal to the amplifier.

[0009]

[Function] When sound is generated in the throat, the pressure in the ear canal fluctuates, and the corresponding vibration sound of the eardrum is collected by the microhorn inserted in the external auditory canal and input to the amplifier as a sound signal. .

[0010]

FIG. 1 shows an embodiment of the present invention, in which a small and high-performance micro horn 1 is inserted into an ear canal of a speaker, and an amplifier 2 provided appropriately outside is provided. Is electrically connected to The microphone 1 is held in the ear canal so as to face the eardrum. For this purpose, for example, an appropriate ear hook can be used.

When sound is generated in the throat, the vibration sound of the eardrum accompanying the sound is collected by the micro horn 1, and a corresponding sound signal is input to the amplifier 2.

FIG. 2 shows a further development of the method of the present invention. In addition to the configuration of FIG. 1 comprising a micro horn 1 and an amplifier 2, an output signal of the amplifier 2 is transmitted via a communication device 3. The transmission is performed to the wired telephone 3A, the wireless telephone 3B, and the other party. Since the input to the communication device 3 is directly collected from the eardrum, it is transmitted to, for example, an electric signal / voice conversion element (for example, an earphone) inserted into the ear canal of the other party, so that a clear voice can be obtained. Can be played.

[0013]

According to the present invention, since the external auditory canal is closed by the microhorn and the sound generated in the throat is collected in the external auditory canal, the surrounding noise is not picked up. In addition, since the earphone vibration sound is collected by the micro horn, it does not pick up the vibration of the ear bone due to the surrounding noise, etc., and from that point, the noise can be more highly isolated than the conventional bone conduction method. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of another embodiment of the present invention.

[Explanation of symbols]

 1: Micro horn 2: Amplifier 3: Communication equipment

Claims (2)

(57) [Claims] 1. A vibration sound transmitted to an eardrum by a sound generated in a throat is collected by a micro horn 1 inserted into an external auditory canal and input as an audio signal to an amplifier 2 connected to the micro horn. A voice capturing method in the ear canal, characterized by the following. 2. An output current of the amplifier 2 is input to a wired or wireless communication device.
The method described in.