The microphone array system, and the program which include the device and this device amendment the sensitivity of the microphone in microphone array

摘要

PPROBLEM TO BE SOLVED: To enable sensitivity correction to be properly performed without paying any special attention about whether or not conditions for properly correcting dispersion in sensitivity of each microphone configuring a microphone array are available. PSOLUTION: A sensitivity correcting device of the microphone produces a separation matrix for performing sound source separation relating to two observed signals to be otained by collecting a mixed sound of two sounds each emitted from different sound sources S (S1, S2) by each of two microphones M1, M2 so that its first line has a dead angle into a normal line direction of an array surface and its second line has the dead angle into an arrangement direction of the microphone. An incoming direction of the sound to be suppressed by matrix elements of the first line of the separation matrix is estimated, then a signal level of an output signal of any one of the microphones is corrected in response to a ratio of each absolute value of the matrix elements of the first line when the incoming direction is not largely separated from the normal line of the array surface. PCOPYRIGHT: (C)2011,JPO&INPIT