Patent ID: 9060232
Filing Date: 2015-06-16
Classification: H04R

Abstract:
1. A hearing aid device with a directional microphone system, comprising: a first microphone configured to output a first microphone signal and a second microphone configured to output a second microphone signal; a delay unit configured for generating a directivity by delaying the second microphone signal or a fourth microphone signal derived therefrom by an internal time delay and associating with the first microphone signal or with a third microphone signal derived therefrom for the purpose of generating a directional microphone signal; a cross-correlation analysis unit connected to receive the first or the third microphone signals and to receive the second or the fourth microphone signals, and configured for determining a value of a cross correlation of the two microphone signals depending on a time delay, and to determine an effective time delay for which the cross-correlation function has a maximum; a classifier for determining an audio condition in which the hearing aid device is currently situated; and a control unit for adjusting the time delay in dependence on the value of the cross correlation of the two microphone signals, wherein the time delay is adjusted depending on the audio condition.