Patent ID: 8953814
Filing Date: 2015-02-10
Classification: G10K,H04M,H04R

Abstract:
1. Noise reduction circuitry, comprising: a first input, for receiving signals from at least one first microphone; a second input, for receiving signals from at least one second microphone; and a detector for determining whether a second microphone is connected to the second input; wherein the noise reduction circuitry is adapted to generate a noise cancellation signal for outputting through a first speaker proximate to said first microphone by applying a first transfer function to the signals received from the first microphone when it is determined that no second microphone is connected to the second input; and is adapted to generate a noise cancellation signal for outputting through a second speaker proximate to said second microphone by applying a second transfer function to the signals received from the second microphone when it is determined that a second microphone is connected to the second input, wherein the second transfer function is different from the first transfer function.