Patent ID: 9318092
Filing Date: 2016-04-19
CPC Classification: G10K

Claim Text:
1. A noise estimation control method, comprising: receiving an input audio signal detected within a space; receiving a reference audio signal that is transmitted by a speaker as an aural signal into the space; processing the input audio signal and the reference audio signal by a signal processor to determine a coherence value based on an amount of the aural signal that is included in the input audio signal; determining whether the input audio signal satisfies a first criterion or a second criterion by processing the input audio signal by the signal processor executing a mode selection; determining a background noise level of the input audio signal; and calculating an amount to adjust a stored background noise estimate by the signal processor based on the coherence value and the background noise level of the input audio signal; where the first criterion and the second criterion enables storing the adjustment of the background noise estimate.