Tuned deconvolution digital filter for elimination of loudspeake

Details Tuned deconvolution digital filter for elimination of loudspeake Tuned deconvolution digital filter for elimination of loudspeake

1990-12-17

1993-02-09

Isen, Forester W.

Electrical audio signal processing systems and devices

Loudspeaker feedback

381 98, 381 59, H04R 300

Patent

active

051858053

ABSTRACT:
A FIR (finite impulse response) type digital filter operates on digital audio signals in modern sound reproduction systems. It is shown that this operation forces the loudspeaker to produce a sound pressure wave having the original signal waveform. Given a multi-driver speaker, its response to a known broad band analog signal (impulsive) is sampled at least as fast as the Nyquist rate. The result is used to construct a deconvolution filter which compacts, in the least-squares sense, the blurred signal (speaker output) back into its original waveform. Since this anti-blurring process is linear and time invariant, it can be applied to the speaker driving signal as a blur preventive. A fine-tuning procedure utilizing Lagrange's Method of Multipliers modifies the deconvolution process such that the blur-free speaker output achieves a degree of flatness in frequency response beyond what could be attained with a simple deconvolution filter.

REFERENCES:
patent: 4888811 (1989-12-01), Takashi

Affiliated with

Also associated with

Rating

Tuned deconvolution digital filter for elimination of loudspeake does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tuned deconvolution digital filter for elimination of loudspeake, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tuned deconvolution digital filter for elimination of loudspeake will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-329676