Loudspeaker system equalization

Details Loudspeaker system equalization Loudspeaker system equalization

1977-06-29

1978-12-19

Stellar, George G.

H04R 304

Patent

active

041307267

ABSTRACT:
Variations in the amplitude-frequency response characteristic of a loudspeaker are compensated by a drive circuit in which an audio input signal is summed with a plurality of delayed replicas of the input signal to provide a drive signal for the loudspeaker. The delayed replicas are derived by discrete time filtering. Noise reduction techniques applied to the least delayed of the plurality of delay signals substantially improves the S/N ratio in the drive signal.

REFERENCES:
patent: 3624298 (1971-11-01), Davis et al.
patent: 3860892 (1975-01-01), Speiser et al.

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