CPC G10K 11/17815 (2018.01) [G10K 11/17817 (2018.01); G10K 11/17823 (2018.01); G10K 11/17825 (2018.01); G10K 11/17883 (2018.01); G10K 2210/12821 (2013.01); G10K 2210/3023 (2013.01); G10K 2210/3026 (2013.01); G10K 2210/3027 (2013.01); G10K 2210/3028 (2013.01); G10K 2210/3044 (2013.01); G10K 2210/3055 (2013.01)] | 18 Claims |
1. An active noise cancellation (ANC) system comprising:
at least one loudspeaker to project anti-noise sound within a cabin of a vehicle based at least on an estimated reference signal and an anti-noise signal;
at least one microphone to provide a first error signal indicative of noise and the anti-noise sound within the cabin; and
at least one filter controller programmed to:
receive the first error signal and the estimated reference signal; and
control at least one adaptive filter to generate the anti-noise signal based at least on the first error signal and the estimated reference signal;
a reference generator programmed to generate the estimated reference signal based at least on one of vehicle speed, temperature of a tire of the vehicle, or tire pressure; and
a frequency downmixer programmed to convert a full bandwidth signal of one of the estimated reference signal and the first error signal into a sub-band frequency range prior to the at least one filter controller controlling the at least one adaptive filter to generate the anti-noise signal based at least on the first error signal and the estimated reference signal.
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