Telephone transmission installation between interlocutors in a n

Details Telephone transmission installation between interlocutors in a n Telephone transmission installation between interlocutors in a n

1978-08-15

1981-01-06

Fears, Terrell W.

179 1P, H04M 119

Patent

active

042438373

ABSTRACT:
An arrangement for controlling a telephone transmission line having an input linked to a sound detection device located in a noisy environment. The transmission line operates only for the transmission of words received by the sound detection device. The transmission line is made operative or inoperative according to whether sound energy variation collected by the sound detection device for duration of a predetermined time interval is superior or inferior to a predetermined approximate audio level.

REFERENCES:
patent: 3555192 (1971-01-01), Hymer

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