Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Adjacent ear
Patent
1992-10-06
1994-03-15
Dwyer, James L.
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Adjacent ear
381 731, A61F 1106, H04R 302
Patent
active
052951928
ABSTRACT:
A method for electrically attenuating a noise in an area for a sound wave to be propagatable in a three dimensional direction by making up a drive signal from the information on the noise and previously given filter coefficients by use of an adaptive digital filter and then generating an additional sound wave in accordance with the drive signal for cancellation of the noise. In the electric noise attenuation method, there are provided in a given region for noise attenuation, first and second error sensor groups for detecting an interference sound wave produced between the noise and additional sound wave, at a sampling time, a filter coefficient is calculated based on the information relating to the first error sensor group, at the next sampling time, another filter coefficient is calculated based on the information relating to the second error sensor group, and these operations are repeatedly executed sequentially for each error sensor to thereby update the filter coefficient of the adaptive digital filter.
REFERENCES:
patent: 4377793 (1983-03-01), Horna
patent: 4473906 (1984-09-01), Warnaka
patent: 4683590 (1987-07-01), Miyoshi
patent: 4689821 (1987-08-01), Salikuddin et al.
patent: 4783817 (1988-11-01), Hamada
patent: 4947434 (1990-08-01), Ito
patent: 5018202 (1991-05-01), Takahashi
Hamada Hareo
Kinoshita Akio
Miura Tanetoshi
Mizuno Keiichiro
Sato Noriharu
Bridgestone Corporation
Chiang Jack
Dwyer James L.
Hamada Hareo
Hitachi , Ltd.
LandOfFree
Electronic noise attenuation method and apparatus for use in eff does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic noise attenuation method and apparatus for use in eff, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic noise attenuation method and apparatus for use in eff will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1541376