Self-correcting audio equalizer

Details Self-correcting audio equalizer Self-correcting audio equalizer

1980-03-07

1982-07-20

Popek, Joseph A.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

333 28R, H04R 304

Patent

active

043407803

ABSTRACT:
A self-correcting audio equalizer is disclosed for use in a high fidelity sound reproduction system. The equalizer (46) responds to the audio signal to provide an equalized audio signal to a sound reproducing device (28) for generating a corresponding acoustic signal. The equalizer includes circuitry (48- 58) for dynamically measuring the differences between the frequency versus amplitude characteristics of the audio and acoustic signals. Another circuit (60- 68) automatically adjusts the frequency versus amplitude characteristics of the equalized audio signal so that the measured differences are reduced. The adjustment of the equalizer thus takes place automatically and substantially continuously during normal operation of the system.

REFERENCES:
patent: 3293364 (1966-12-01), Richter
patent: 3539725 (1970-11-01), Hellwarth, et al.
patent: 3949325 (1976-04-01), Berkovitz
patent: 4046960 (1977-09-01), Veale
patent: 4113983 (1978-09-01), Steel
patent: 4118601 (1978-10-01), Yeap

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