Patent ID: 6275592
Filing Date: 2001-08-14
Classification: G10K,H04M

Abstract:
A method for attenuating noise in a space by generating antinoise, characterised in that, it comprises the steps to:determine a noise reference,determine a weighing function,determine an estimate function of an electroacoustic response of the space,process the noise reference with the weighting function and with the estimate function of the electroacoustic response in order to generate a first signal,measure a residual noise, which is formed as a result of an interaction between noise prevailing in the space and the antinoise supplied into the space,process the residual noise with the weighting function in order to generate a second signal,filter the noise reference adaptively, whereby the adaptive filtering is controlled based on the first signal and the second signal so that the second signal is minimised, and the adaptively filtered signal is supplied as antinoise into the space.