Automatic sound controlling method and apparatus for improving a

Details Automatic sound controlling method and apparatus for improving a Automatic sound controlling method and apparatus for improving a

1994-09-21

1997-07-15

Kuntz, Curtis

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Within duct

381 7111, A61F 1106, H03B 2900

Patent

active

056490160

ABSTRACT:
An automatic sound controlling apparatus including a first adaptive filter means that forms a compensating signal for canceling a stationary sound, a signal producer means that produces a predetermined shape signal based on a timing signal with respect to a sound, a second adaptive filter means that forms a compensating signal for canceling a fluctuating sound by the predetermined shape signal, whereby in the case that a sound period changes sharply, an output signal of the second adaptive filter means is output in stead of the first adaptive filter means.

REFERENCES:
patent: 4122303 (1978-10-01), Chaplin et al.
patent: 4153815 (1979-05-01), Chaplin et al.
patent: 4677676 (1987-06-01), Eriksson
patent: 4677677 (1987-06-01), Eriksson
patent: 5022082 (1991-06-01), Eriksson et al.
patent: 5029218 (1991-07-01), Nagayasu
patent: 5093864 (1992-03-01), Sekiguchi et al.
patent: 5097923 (1992-03-01), Ziegler et al.
patent: 5106377 (1992-04-01), Ziegler, Jr.
patent: 5111507 (1992-05-01), Nakaji
patent: 5146505 (1992-09-01), Pfaff et al.
patent: 5404409 (1995-04-01), Nagami et al.
Eriksson, L.J. "Recursive Algorithms for Active Noise Control", International Symposium Apr. 9-11, 1991, pp. 137-146.
Eriksson, L.J. "Recursive Algorithms for Active Noise Control"; Apr. 4-11, 91, pp. 137-146, International Symposium Active Control of Sound and Vibration.
Patent Abstracts of Japan, vol. 17, No. 502 (P-1610) JP-A-51 027 680 (Fujitsu Ten Ltd) 25 May 1993.

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