Patent ID: 8693699
Filing Date: 2014-04-08
Classification: G10K,H04R

Abstract:
1. A method for altering the soundfield in an electroacoustic channel in which a first audio signal is applied by a first electromechanical transducer to an acoustic space, causing changes in air pressure in the acoustic space, and a second audio signal is obtained by a second electromechanical transducer in response to changes in air pressure in the acoustic space, comprising: establishing, in response to the second audio signal and an audio input signal, a transfer function estimate of the electroacoustic channel, said transfer function estimate being adaptive in response to temporal variations in the transfer function of the electroacoustic channel, wherein the first audio signal is obtained on the basis of an additive combination of two signals, namely the audio input signal or a filtered version thereof, and a feedback signal, and wherein the establishing comprises: obtaining one or more filters whose transfer function is based on the transfer function estimate, and applying the first audio signal to the one or more filters.