US 12,149,900 B2
Sound control device of vehicle and method for controlling the same
Jung Keun You, Suwon-si (KR); Jong Won Lee, Anyang-si (KR); Kaang Dok Yee, Yongin-si (KR); Chi Sung Oh, Hwaseong-si (KR); and Hyun Jin Song, Seoul (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Aug. 1, 2022, as Appl. No. 17/878,565.
Claims priority of application No. 10-2021-0175802 (KR), filed on Dec. 9, 2021.
Prior Publication US 2023/0188891 A1, Jun. 15, 2023
Int. Cl. H04R 3/04 (2006.01)
CPC H04R 3/04 (2013.01) [H04R 2499/13 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for controlling a sound control device in a vehicle, the method comprising:
generating a first noise control signal based on a transfer function and delay time of a primary path between a sensor for measuring an acceleration signal of the vehicle as a reference signal and a speaker, and outputting the first noise control signal through the speaker;
obtaining an error signal corresponding to residual noise remaining after noise in the vehicle is attenuated by the first output noise control signal and an audio signal;
calculating magnitudes of low frequency components of the error signal;
adjusting magnitudes of low frequency components of the audio signal according to the magnitudes of the low frequency components of the error signal; and
outputting the adjusted audio signal through the speaker,
wherein the obtaining of the error signal comprises:
predicting the error signal at the speaker based on the transfer function of the primary path, and
wherein the method further comprises:
generating a second noise control signal further based on the error signal fed back from a microphone for measuring an acoustic signal in the vehicle and a transfer function and delay time of a secondary path between the speaker and the microphone; and
outputting the second noise control signal through the speaker.