Vibration pickup microphone

Abstract

Provided is a microphone for communications and speech-recognition inputs with loud noises around, more particularly, to a vibration pickup microphone which hardly howls when speeches are simultaneously transmitted and received. The vibration pickup microphone comprises a housing (1) arranged on the human-body abutting face of a transmitter / receiver, a microphone unit (2) of an aerial vibration collecting type to be assembled in the housing (1), and a microphone holder (5) made of an elastic material for supporting the microphone unit (2) in the housing (1). The housing (1) includes a case (3) having an upper face opened for fitting the microphone holder (5), and a cover (4) made of an elastic material for covering the outer side faces of the case (3). A double-layered diaphragm (6) is so arranged on the upper face of the microphone holder (5) as to form an air chamber (16) between itself and the microphone holder (5), and a sealed cavity (7) is formed between diaphragms (6a and 6b) constituting the double-layered diaphragm (6).

Description

technical field [0001] The present invention relates to a vibration pickup microphone, and more particularly, to a vibration pickup microphone of the type that picks up bone vibration, vocal cord vibration. Background technique [0002] There are bone conduction microphones and throat microphones as microphones that are difficult to sense external noise and only pick up the speaker's voice. Among them, as representative bone conduction microphones that pick up bone vibrations, there are Figure 5 As shown, the piezoelectric element is used and the acceleration pickup microphone is supported by the support portion. [0003] As a disadvantage of this type of microphone, it is pointed out that it is not resistant to mechanical vibration, that is, when it touches a case or a cable, the vibration and sliding sound are largely picked up. In addition, in this type of microphone, the case housing the components itself functions as a sensor for external sound, so there is a disadvan...

AI Technical Summary

Problems solved by technology

[0003] As a disadvantage of this type of microphone, it is pointed out that there is a problem that it is not resistant to mechanical vibration, that is, when it touches a case or a cable, its vibration and sliding sound are largely picked up.

In addition, in this type of microphone, the case housing the components itself functions as a sensor for external sound, so there is a disadvantage that S / N with external sound cannot be ensured under high noise conditions exceeding 110dB SPL

[0004] Furthermore, there are also electrodynamic microphones (see Image 6 ), which is good for vibration, but has the disadvantage of becoming larger in structure

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