Dynamic microphone

Details Dynamic microphone Dynamic microphone

2008-12-04

2011-10-04

Tran, Long (Department: 2829)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Housed microphone

C381S177000, C381S356000, C381S357000, C381S358000, C381S360000, C381S361000, C381S369000

Reexamination Certificate

active

08031898

ABSTRACT:
There is provided a dynamic microphone in which the output impedance does not increase and also the failure rate does not increase though using a microphone unit and a vibration detecting unit to reduce handling noise. In the dynamic microphone including a microphone unit20that includes a first diaphragm24and a first magnetic circuit26and delivers sound signals and a vibration detecting unit30that includes a second diaphragm32and a second magnetic circuit33and detects vibrations applied to a microphone case, whereby the output signal of the vibration detecting unit30being delivered as an opposite phase with respect to the output signal of the microphone unit20, a field coil41excited by the output signal of the vibration detecting unit30is provided on the first magnetic circuit26side of the microphone unit20.

REFERENCES:
patent: 2848561 (1958-08-01), Gorike
patent: 3459902 (1969-08-01), Warning
patent: 3995124 (1976-11-01), Gabr
patent: 4427845 (1984-01-01), Yoshida
patent: 6091828 (2000-07-01), Akino et al.

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