Patent ID: 6931137
Filing Date: 2005-08-16
Classification: H04R

Abstract:
1. A feedback compensator for use with an acoustic amplifier to compensate feedback arising upon amplification of an input signal in an input signal path, in a feedback path between an amplified output signal and said input signal, said feedback compensator comprising: an adaptive feedback compensation filter that forms a feedback compensation path mimicking said feedback path, and which generates a feedback compensation signal; an adaptation unit connected to said adaptive feedback compensation filter for adapting said adaptive feedback compensation filter to form said feedback compensation path; a frequency-limiting filter connected to limit a frequency range of said frequency compensation path; a division of said input signal path into a first branch and a second branch; a first filter in said first branch and a second filter in said second branch; a first node in said first branch following said first filter, to which said feedback compensation signal is supplied, at which said feedback compensation signal is subtracted from an output of said first filter; a second node in said first branch following said first node, from which an error signal is supplied to said adaptation unit; and a third node connected to said second node and to an output of said second filter to add said error signal and said output of said second filter to produce a signal adapted for supply to an input of the acoustic amplifier.