Miniature device for receiving and playing back sound with piezo

Details Miniature device for receiving and playing back sound with piezo Miniature device for receiving and playing back sound with piezo

1997-08-14

2000-02-22

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Miscellaneous

369 64, 4012403, 40455, H04M 165

Patent

active

060287527

ABSTRACT:
Sound recording and playback device comprising a sound pick-up microphone connected to a recording channel and a playback loudspeaker connected to a channel for playing the recorded sounds, characterised in that the microphone and the loudspeaker consist of one and the same component (5).

REFERENCES:
patent: 4471258 (1984-09-01), Kumada
patent: 4618896 (1986-10-01), Rusyniak
patent: 4715060 (1987-12-01), Lipscher et al.
patent: 4791741 (1988-12-01), Kondo
patent: 5063698 (1991-11-01), Johnson et al.
patent: 5115472 (1992-05-01), Park et al.
patent: 5166851 (1992-11-01), Jacobson
Patent Abstracts of Japan, vol. 13, No. 152 (P-856) Apr. 13, 1989, & JP-A-63 313 398 (Tatsuta Electric Wire & Cable Co Ltd) Dec. 21, 1988.

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