Audio system with feedback detection means

Details Audio system with feedback detection means Audio system with feedback detection means

2011-04-12

2011-04-12

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Feedback suppression

C381S083000, C381S095000, C381S096000, C381S121000, C381S318000

Reexamination Certificate

active

07925031

ABSTRACT:
The invention concerns an audio system comprising a microphone, audio signal processing means, an output transducer and mans for detecting a possible feedback tone and the corresponding frequency of the feedback tone in the audio system between the output transducer and the microphone. According to the invention means for counteracting feedback are provided. Further, mans are provided for changing the phase of the audio signal at a given frequency.

REFERENCES:
patent: 4905290 (1990-02-01), Yaoita
patent: 2005/0047620 (2005-03-01), Fretz
patent: 2005/0226447 (2005-10-01), Miller, III
patent: 197 48 079 (1999-05-01), None
patent: WO-2004/105429 (2004-12-01), None
patent: WO-2004/105430 (2004-12-01), None

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