Acoustic power system

Details Acoustic power system Acoustic power system

1969-05-15

1976-02-10

Blakeslee, Ralph D.

179 1A, H04M 100

Patent

active

039378870

ABSTRACT:
An acoustic power system includes a speaker which generates acoustic energy in response to electrical driving signals. Electrical representations of the acoustic energy generated by the speaker are effectively subtracted from electrical input signals having a preselected frequency response to produce electrical error signals. The error signals are amplified to produce the electrical driving signals which operate the speaker. In the preferred embodiment, the electrical representations of the acoustic energy generated by the speaker are produced by detecting a portion of the impedance produced across the speaker voice coil.

REFERENCES:
patent: 3047661 (1962-07-01), Winker
patent: 3118972 (1964-01-01), Walczak
patent: 3334184 (1967-08-01), DeKoning
patent: 3363060 (1968-01-01), Grodinsky
patent: 3365545 (1968-01-01), Petrie
patent: 3399277 (1968-08-01), Davis et al.
patent: 3431358 (1969-03-01), Goncharoff
patent: 3530244 (1970-09-01), Reiffin

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