Speech control apparatus used in a folding telephone

Details Speech control apparatus used in a folding telephone Speech control apparatus used in a folding telephone

1995-06-20

1997-03-04

Brown, Thomas W.

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

379433, 379406, 379410, 381107, 381109, H04M 100

Patent

active

056087934

ABSTRACT:
In a speech control apparatus used in a folding telephone, a rotary switch detects the rotating angle of the hinge of the folding telephone and delivers a control signal indicative of the hinge rotating angle to a speech controller. The speech controller controls the level of the speech signal from a microphone. The speech controller suppresses the noise included in the speech signal based on the control signal. The speech controller suppresses the echo included in the speech signal by generating an echo replica in accordance with the control signal and a radio signal from the communication partner.

REFERENCES:
patent: 5048091 (1991-09-01), Sato et al.
patent: 5341420 (1994-08-01), Hollier et al.
patent: 5436954 (1995-07-01), Nishiyama et al.
patent: 5440629 (1995-08-01), Gray
patent: 5463687 (1995-10-01), Takizawa

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