Patent ID: 6950528
Filing Date: 2005-09-27
Classification: H04R

Abstract:
1. A method for suppressing an acoustic interference signal in an incoming audio signal from an acoustic source to a directional microphone system, having at least two microphones, comprising the steps of: detecting said incoming audio signal with said at least two microphones and, in each of said at least two microphones, producing an output microphone signal therefrom; generating at least two directional microphone signals by combining the respective output microphone signals with respective weightings, the respective weightings defining a direction-dependent sensitivity distribution of the directional microphone system; normalizing each of said directional microphone signals with respect to the same sensitivity of the directional microphone system in one direction region, for producing normalized directional microphone signals each having an interference signal component; and selecting one of said normalized directional microphone signals having a lowest interference signal component as an output directional microphone signal.