Patent ID: 9215749
Filing Date: 2015-12-15
Classification: G10K,H04W

Abstract:
1. A method, comprising: receiving a first signal from a first microphone, the first microphone facing a user; receiving a second signal from a second microphone, the second microphone facing the user; calculating a parameter proportional to acoustic particle velocity based, at least in part, on the first signal and the second signal; calculating an acoustic intensity vector based, at least in part, on the calculated parameter proportional to the acoustic particle velocity; adjusting an audio output signal for output to a transducer based, at least in part, on the calculated acoustic intensity vector, wherein the step of adjusting the audio output signal comprises adjusting an active noise control algorithm to reduce the acoustic intensity vector; calculating an acoustic impedance based, at least in part, on the calculated parameter proportional to the acoustic particle velocity; and disabling the active noise control algorithm when the determined acoustic impedance indicates the device is removed from the user's ear.