Patent ID: 9532139
Filing Date: 2016-12-27
CPC Classification: G10K,H04R

Claim Text:
1. In a multiple microphone system having at least two microphones, a method of self-calibration, comprising: receiving ambient noise signals from the at least two microphones; tracking noise minima in a time domain for each of the ambient noise signals from the at least two microphones by tracking the noise minima of each of the ambient noise signals from the at least two microphones for a predetermined number of frequency bins; calculating an amplitude calibration value based on a ratio of the noise minima of each of the ambient noise signals from two of the at least two microphones by calculating the amplitude calibration value for each of the predetermined number of frequency bins based on the ratio of the noise minima of each of the ambient noise signals from the two of the at least two microphones; and altering gain of at least one of the at least two microphones to calibrate one of the at least two microphones relative to another of the at least two microphones based on the amplitude calibration value.