Detection and suppression of wind noise in microphone signals

摘要

The present invention relates to a microphone system, comprising at least one directional microphone with a first directivity to obtain a first microphone signal, at least one directional microphone with a second directivity that is worse than the first directivity, in particular, an omni-directional microphone, to obtain a second microphone signal, a detection means configured to receive the first and the second microphone signals and to output a detection signal indicating whether non-acoustic perturbations, in particular, wind noise, in the first and/or the second microphone signals exceed a predetermined level and a signal processing means configured to output an output signal generated from the first microphone signal and/or the second microphone signal on the basis of the detection signal. The invention also relates to a method reducing non-acoustic perturbations in microphone signals comprising detecting an audio signal by at least one directional microphone of a first directivity to obtain a first microphone signal, detecting the audio signal by at least one directional microphone with a second directivity that is worse than the first directivity, in particular, an omni-directional microphone, to obtain a second microphone signal, determining whether non-acoustic perturbations, in particular, wind noise, that exceed a predetermined level are present in the first and/or the second microphone signal and outputting an output signal generated from the first microphone signal and/or the second microphone signal on the basis of the result of the determining whether non-acoustic perturbations that exceed a predetermined level are present in the first and/or the second microphone signal.