Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Housed microphone
Reexamination Certificate
2007-11-01
2011-11-01
Nguyen, Tuan (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Housed microphone
C381S361000, C381S174000, C381S191000
Reexamination Certificate
active
08050443
ABSTRACT:
A microphone contains a capacitor in a capsule with a diaphragm serving as one of electrodes of the capacitor. The microphone is mounted on a mounting board when external terminals installed on an external surface of a circuit board which closes an opening of the capsule are connected face to face with connection terminals on the mounting board. A sound hole is formed in the circuit board and through-hole is formed in the mounting board, being placed in such a position as to avoid overlapping each other when the microphone is mounted. An enclosed space which communicates the through-hole and sound hole is formed when the external terminals are connected with the connection terminals on the mounting board.
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Baba Tsuyoshi
Izuchi Toshiro
Nakanishi Kensuke
Ono Kazuo
Ota Kiyoshi
Hosiden Corporation
Lathrop David N.
Nguyen Tuan
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