US 12,293,750 B2
Occupancy based active noise cancellation systems
Kevin J. Bastyr, Franklin, MI (US); and Antonio Gomez, Hazel Park, MI (US)
Assigned to HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED, Stamford, CT (US)
Appl. No. 18/019,211
Filed by HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED, Stamford, CT (US)
PCT Filed Aug. 5, 2020, PCT No. PCT/US2020/044961
§ 371(c)(1), (2) Date Feb. 1, 2023,
PCT Pub. No. WO2022/031279, PCT Pub. Date Feb. 10, 2022.
Prior Publication US 2023/0306947 A1, Sep. 28, 2023
Int. Cl. G10K 11/178 (2006.01)
CPC G10K 11/17813 (2018.01) [G10K 11/17879 (2018.01); G10K 2210/1282 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An active noise cancellation (ANC) system comprising:
at least one loudspeaker to project anti-noise sound within a passenger cabin of a vehicle in response to receiving an anti-noise signal;
at least one microphone to provide an error signal indicative of noise and the anti-noise sound within the passenger cabin;
an occupancy controller programmed to:
modify a transfer function between the at least one microphone and at least one virtual microphone based on an occupancy signal indicative of occupant presence within the passenger cabin, and
increase a gain associated with the at least one virtual microphone in response to an occupant being proximate to the at least one virtual microphone;
an adaptive filter controller programmed to filter the error signal using the transfer function to obtain an estimated virtual microphone error signal; and
a controllable filter to generate the anti-noise signal based on the estimated virtual microphone error signal.