Patent ID: 8229126

Claim:
A method for noise reduction, comprising: receiving a primary mixed input signal at a first microphone system of a communication device and a second mixed input signal at a second microphone system of said communication device, said first and second microphone systems disposed at locations on said communication device so that far field sound originating in a far field environment relative to said first and second microphone systems produces a first difference in sound signal amplitude at said first and second microphone systems; dynamically identifying a first far field sound component contained in said primary mixed input signal and a second far field sound component contained in said secondary mixed input signal based on said first difference, said first far field sound component having first magnitude values and said second far field sound component having second magnitude values; generating adjusted magnitude values by setting said second magnitude values equal to said first magnitude values; determining a plurality of gain values using said first magnitude values and said adjusted magnitude values; and automatically reducing said first far field sound component using said plurality of gain values.