Loudspeaker equalization

Details Loudspeaker equalization Loudspeaker equalization

1977-06-29

1978-12-19

Stellar, George G.

H04R 304

Patent

active

041307275

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 delayed signal derived from the input signal to provide a drive signal for the loudspeaker. The delayed signal is derived by discrete time filtering and may be formed by storing successively sampled values of the input or drive signal in either digital or analog form, and subsequently recalling the stored values in sequence, or by passing the input or drive signal through a series of all-pass phase-shift filters.

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

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