Digital graphic equalizer

Details Digital graphic equalizer Digital graphic equalizer

H - Electricity

04

R

179/38, 328/0.2

H04R 3/04 (2006.01) H03G 5/00 (2006.01) H03G 5/16 (2006.01)

Patent

CA 1230828

ABSTRACT OF THE DISCLOSURE A digital graphic equalizer includes a pulse-se- quence generator for generating a sequence of pulse signals, a first digital signal processor for filtering the pulse signals to produce a filtered signal, a digital-to-analog converter responsive to the filtered signal for producing a calibrating signal, and a loudspeaker responsive to the calibrating signal for propagating a calibrating sound in a listening environment, the frequency characteristics of the calibrating sound being subject to modification by the listening environment. A detector detects the calibrating sound as propagated in the listening environment and pro- duces a detection signal representative thereof. An ana- log-to-digital converter is responsive to the detection signal for producing a digital signal corresponding thereto, and a second digital signal processor is responsive to the digital signal for producing a plurality of frequen- cy-divided signals. A spectrum analyzer is responsive to the frequency-divided signals for analyzing the frequency characteristics of the calibrating sound as propagated in the listening environment and producing a compensating signal adapted to compensate for the modification by the listening environment of the frequency characteristics of the calibrating sound. -1-

477201

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