Voice transducer

Details Voice transducer Voice transducer

1991-06-17

1993-07-13

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Body contact wave transfer

381 683, 381173, H04R 2500

Patent

active

052280926

ABSTRACT:
A voice transducer used for telecommunication by a telephone installed in a motor vehicle or the like, including: a main body having a side surface to be contacted with an operator's head so as to detect vibrations of produced voice waves when they are transmitted through the skull of the head, and convert them into electric signals; a holder member of the main body; and a connecting member which connects the main body to the holder member in such a manner that the position of the side surface of the main body with respect to the operator's head can be adjusted. The main body includes a piezoelectric transducer to detect the vibrations, a damper material which surrounds the piezoelectric transducer, and a casing which surrounds the damper material and includes the side surface to be contacted with the operator's head, and the side surface of the casing is pre-treated to have a small coefficient of friction. Such transducer solves the problems of output voltage drop and drastic deterioration of the S/N ratio which are induced by unfavorable contact between the voice transducer and the operator's head or by unnecessary vibrations which are generated by friction between the operator's hair and the voice transducer.

REFERENCES:
patent: 4156800 (1979-05-01), Sear et al.
patent: 4596903 (1986-06-01), Yoshizawa
patent: 4696045 (1987-09-01), Rosenthal
patent: 4793652 (1988-12-01), Hannah et al.
patent: 4903703 (1990-02-01), Igarashi et al.
patent: 5054079 (1991-10-01), Frielingsdorf et al.

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