Radio transmitter and receiver device having a headset with spea

Details Radio transmitter and receiver device having a headset with spea Radio transmitter and receiver device having a headset with spea

1983-11-29

1987-03-31

Ng, Jin F.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455 90, 379430, 381151, H04B 138

Patent

active

046548831

ABSTRACT:
A radio transmitter and receiver device in which a head band has a transmitting microphone at one end and a receiving speaker at the other end. This microphone comprises a bone transmission type microphone for detecting aural oscillation of an external auditory canal transmitted through a bone tissue of a head portion from a mouth, said microphone being brought into contact with a side head portion at the rear of an ear. Thus, one ear is blocked by the speaker but the other ear is open, and therefore, a user can catch noises thereabout. A transmitting and receiving antenna has matching means and is mounted on the side of the speaker.

REFERENCES:
patent: 3122847 (1964-03-01), Redfield et al.
patent: 3908097 (1975-09-01), Higgins, Jr.
patent: 4017797 (1977-04-01), Laesig
patent: 4025734 (1977-05-01), Aloupis
patent: 4138598 (1979-02-01), Cech
patent: 4150262 (1979-04-01), Ono
patent: 4334315 (1982-06-01), Ono et al.

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