Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1984-08-16
1985-03-12
Brown, Thomas W.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
1791155PS, 179116, 181163, H04R 122
Patent
active
045047030
ABSTRACT:
An electro-acoustic transducer capable of operating as an emitter and as a pick-up for acoustic waves in an ambient medium includes a cover member having an opening for communication with the ambient medium, first and second diaphragms which are spaced from each other within the cover member, the second diaphragm being capable of vibrating under the effect of acoustic waves and being disposed between the first diaphragm and the opening in the cover member, an electromagnet for causing vibrations of the first diaphragm in response to electrical excitation signals when the transducer is operating in the emitter mode, an air cushion contained in a closed chamber separating the two diaphragms or a rigid mechanical connection between the two diaphragms for communicating the vibrations of the first diaphragm to the second diaphragm, and a pair of electrodes disposed on opposite sides of the second diaphragm, which is preferably a sheet of electret, for producing an output signal in response to vibrations of the second diaphragm produced by acoustic waves which are propagated in the ambient medium when the transducer is operating in the pick-up mode.
REFERENCES:
patent: 1412539 (1922-04-01), Murray
patent: 1460034 (1923-06-01), Murray
patent: 1772198 (1930-08-01), Anderson
patent: 2634337 (1953-04-01), Bland
patent: 2903673 (1959-09-01), Harris
patent: 3306990 (1967-02-01), Walker
patent: 3538494 (1968-11-01), Erickson
patent: 3821492 (1974-06-01), Tamura et al.
patent: 3943304 (1976-03-01), Piribauer
patent: 4147899 (1979-04-01), Mori et al.
patent: 4268725 (1981-05-01), Nakagawa
Curchod Anne
Fluckiger Jean-Frederic
Schneiter Ali
Asulab S.A.
Brown Thomas W.
Schroeder L. C.
LandOfFree
Electro-acoustic transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electro-acoustic transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-acoustic transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-709331