ESTIMATING ROOM IMPULSE RESPONSE FOR ACOUSTIC ECHO CANCELLING Russian patent published in 2019 - IPC H04R3/00 

FIELD: electrical communication engineering.

SUBSTANCE: invention relates to acoustic metrology. Method for estimating a room impulse response between an audio source and an array of microphones comprises several steps. First, signals are received, geometrical sizes of the microphone array are estimated, room impulse response is estimated. Room response is estimated using a basis vector of the type

.

Here is l(t) is a function of a time-continuous version of audio signal source; L_x denotes the duration of the received calibration signal on each microphone; T_s is sampling interval; T - propagation delay from source to centre of microphone array; m is a function z_k and θ, where z_k is a separate microphone of the microphone array and θ is the angle of arrival of the received signal.

EFFECT: technical result is high accuracy of estimating room response.

21 cl, 7 dwg