Audio conference device having echo canceller

Details Audio conference device having echo canceller Audio conference device having echo canceller

1996-04-23

1998-07-07

Le, Huyen

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Thermal response to, or generation of, sound vibration

381168, 381205, 379202, H04R 2500

Patent

active

057780854

ABSTRACT:
In an audio conference device for housing an acoustic echo canceller function, a speaker and a microphone in a portable frame, a microphone 5 is provided in a tubular elastic member 4 whose tip end has been protruded in the shape of a funnel. This elastic member 4 is mounted so that its funnel-shaped tip end protrudes outwardly from the frame. With this structure, it is possible to prevent the speech sound, which propagates inside the frame from the speaker from being collected by the microphone, thus making it possible to reduce the degree of acoustic combination between the microphone and the speaker.

REFERENCES:
patent: 1235510 (1917-07-01), Tigerstedt
patent: 3947646 (1976-03-01), Saito
patent: 5282245 (1994-01-01), Anderson

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