Automatic transmission or recording or transmission and receptio

Dynamic information storage or retrieval – Control by timer or external extraneous condition

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Details

179 1SW, 179 1VC, 179 1HF, 179107BC, 179107E, 360 741, 455100, G11B 1500

Patent

active

043239994

ABSTRACT:
A system to automatically control the changeover of recording and recording stop, or transmission and transmission stop, and being employed in the recording or transmitting device provided with a vibration pick-up type microphone for picking up bone-conducted voice sounds. The automatic changeover of recording and recording stop or transmission and transmission stop is attained by control signals corresponding to impact vibrations except voice signals uttered by a microphone wearer himself, transmitted through his bones and picked up by the microphone or another controlling microphone.

REFERENCES:
patent: 2255250 (1941-09-01), Greiback
patent: 3067289 (1962-12-01), Zimmermann
patent: 3297021 (1967-01-01), Davis
patent: 3593703 (1971-07-01), Gunn
patent: 4041394 (1977-08-01), Pate
patent: 4188549 (1980-02-01), Dorais
"Experimental Wide-Bandwidth Touch-Contact Microphone", by A. J. Brouns; J. Audio Eng. Soc., Jan., 1971, vol. 19, No. 1, pp. 41-45.

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