Patent ID: 9167357
Filing Date: 2015-10-20
Classification: H04R

Abstract:
1. A method for improving a signal-to-noise ratio in laterally occurring acoustic useful signals, the method comprising the following steps: receiving acoustic signals with at least two microphones of a microphone system, one of the microphones being closer to a source of the acoustic signals than the other of the microphones; defining a spatial direction as a useful signal direction and a spatial direction as a noise signal direction; determining a noise signal by differential processing of output signals of the microphone system, and achieving a lower sensitivity in the useful signal direction than in the noise signal direction; determining a useful signal by differential processing of the output signals of the microphone system, and achieving a higher sensitivity of the microphone system in the useful signal direction than in the noise signal direction; determining a noise signal level in dependence on the noise signal; determining a useful signal level in dependence on the useful signal; and determining an amplification factor for amplification of acoustic signals received with the microphones in dependence on the noise signal level and the useful signal level.