Patent ID: 9167358
Filing Date: 2015-10-20
Classification: H04R

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