US 11,990,112 B2
Apparatus, system and/or method for acoustic road noise peak frequency cancellation
David Trumpy, Novi, MI (US); and Santosh Adari, Stamford, CT (US)
Assigned to Harman International Industries, Incorporated, Stamford, CT (US)
Filed by Harman International Industries, Incorporated, Stamford, CT (US)
Filed on Oct. 21, 2022, as Appl. No. 17/971,377.
Prior Publication US 2024/0135911 A1, Apr. 25, 2024
Int. Cl. G10K 11/178 (2006.01)
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
OG exemplary drawing
 
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.