| CPC G10K 11/17825 (2018.01) [G10K 11/17875 (2018.01); G10K 2210/1282 (2013.01)] | 15 Claims |
|
1. An active noise cancellation (ANC) system comprising:
at least one loudspeaker to project anti-noise sound within a cabin of a vehicle in response to receiving a first anti-noise signal;
at least one microphone to provide an error signal indicative of noise and the anti-noise sound within the cabin;
a head tracker sensor to provide a first signal indicative of a position of a user's head in a vehicle;
at least one controllable filter programmed to:
modify a transfer function between the at least one microphone and at least one remote microphone location to generate an estimated remote microphone error signal based at least on the error signal and the first signal;
generate the first anti-noise signal to account for the position of the user's head in the vehicle at least based on the estimated remote microphone error signal;
receive the first signal indicative of the position of the user's head in the vehicle;
modify a transfer function thereof in response to the first signal;
provide a second signal to generate the first anti-noise signal after modifying the transfer function; and
filter the first anti-noise signal based at least on the first signal; and
a controller programmed to determine filter coefficients for the at least one controllable filter based on anti-noise that is present at a new location of the user's head and on anti-noise that is present at a previous location of the user's head.
|