Howling detection device and method

Details Howling detection device and method Howling detection device and method

2011-03-22

2011-03-22

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Feedback suppression

C381S083000

Reexamination Certificate

active

07912230

ABSTRACT:
A howling detection device detects a dominance ratio, which indicates a risk of howling to occur when a mixed signal obtained by mixing a plurality of sound signals collected by a plurality of microphones is outputted by a speaker. The howling detection device detects levels of the plurality of sound signals, compares, in a same time domain, the mixed signal with a signal regarding a sound to be outputted by the speaker as a noise reference signal, detects a time period, as a word ending section, during which the mixed signal is inputted after the noise reference signal falls, and calculates a dominance ratio by extracting only a level of the plurality of sound signals corresponding to the word ending section and determining a ratio of each of the extracted levels of each of the sound signals to a sum of the extracted levels of the plurality of sound signals.

REFERENCES:
patent: 7133529 (2006-11-01), Ura
patent: 7190800 (2007-03-01), Terada et al.
patent: 7760888 (2010-07-01), Kanamori et al.
patent: 04-273642 (1992-09-01), None
patent: 04-277998 (1992-10-01), None
patent: 08-033091 (1996-02-01), None
patent: 08-223274 (1996-08-01), None
patent: 2002-223182 (2002-08-01), None
patent: 2002-237769 (2002-08-01), None
patent: 2003-250193 (2003-09-01), None
patent: 2003-284183 (2003-10-01), None

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