Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Patent
1985-10-31
1987-09-15
Rubinson, Gene Z.
Electrical audio signal processing systems and devices
Including frequency control
Having automatic equalizer circuit
381 59, H04R 304
Patent
active
046944982
ABSTRACT:
An automatic sound field correcting system with graphic equalizer means to be provided in an audio signal supply line. A test signal such as a pink noise is radiated in the listening space and detected at a predetermined listening point to determine the detection frequency characteristic of the test signal, thereby to adjust the frequency characteristic of the graphic equalizer means. Thereafter, the frequency characteristic of the graphic equalized means is made equal to different band-pass filter characteristics, one after another, and each time the equalization is effected, the detected test signal is obtained through the grapic equalizer means for determination of the detected frequency characteristic of the test signal.
REFERENCES:
patent: 3207848 (1965-09-01), Bore
patent: 3732370 (1973-05-01), Sacks
patent: 4340780 (1982-07-01), Odlen
patent: 4458362 (1984-07-01), Berkowitz
patent: 4610024 (1986-09-01), Schulhof
Kato Masayuki
Kunugi Yoshiro
Suzuki Shin'ichi
Tokumo Akio
Pioneer Electronic Corporation
Rubinson Gene Z.
Schroeder L. C.
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