Patent ID: 8923530

Claim:
A method comprising: receiving an ambient sound at a first microphone and at a second microphone from at least one of i) a person and ii) a loudspeaker, wherein the person and the loudspeaker are spatially distinct, wherein the first microphone and the second microphone operate as a differential array with respect to sounds received from the loudspeaker, and wherein the loudspeaker is located in the near-field of the first microphone and the second microphone, and the person is located in the far-field of the first microphone and the second microphone; and transmitting an electromagnetic signal that is based on: i) the ambient sound as received by the first microphone, ii) the ambient sound as received by the second microphone, and iii) a filter whose set of recalculable filter coefficients is based on the frequency spectrum of a calibration sound that is transmitted from the loudspeaker, the calibration sound comprising a stationary wideband signal.