Signal amplification system with automatic equalizer

Details Signal amplification system with automatic equalizer Signal amplification system with automatic equalizer

1996-04-02

1998-06-16

Isen, Forester W.

Electrical audio signal processing systems and devices

Including frequency control

Having automatic equalizer circuit

381 83, 381 93, 379388, 379410, H03G 500

Patent

active

057683980

ABSTRACT:
A signal amplification system wherein a signal coming from a microphone is applied to a loudspeaker via a signal processing system. The signal processing system includes an estimator for estimating the transfer function from the loudspeaker to the microphone. The equalizer is set to a transfer function that is reciprocal to the transfer function from the loudspeaker to the microphone to equalize the transfer function from the microphone to the listeners. The estimator may include an adaptive filter which has a transfer function that approaches the transfer function from the loudspeaker to the microphone.

REFERENCES:
patent: 4783818 (1988-11-01), Graupe et al.
patent: 5027410 (1991-06-01), Williamson et al.
patent: 5131047 (1992-07-01), Hashimoto et al.
patent: 5131051 (1992-07-01), Kishinaga
patent: 5263019 (1993-11-01), Chu
patent: 5481615 (1996-01-01), Eatwell et al.

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