US 11,948,547 B2
Information quantity-based reference sensor selection and active noise control using the same
Mun Hwan Cho, Seoul (KR); Kaang Dok Yee, Yongin-si (KR); Chi Sung Oh, Hwaseong-si (KR); Jung Keun You, Suwon-si (KR); Yun Seol Park, Seoul (KR); and Yeon June Kang, Seoul (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); and SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); Kia Corporation, Seoul (KR); and SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul (KR)
Filed on Sep. 2, 2022, as Appl. No. 17/902,375.
Claims priority of application No. 10-2021-0181773 (KR), filed on Dec. 17, 2021.
Prior Publication US 2023/0197052 A1, Jun. 22, 2023
Int. Cl. G10K 11/178 (2006.01); H04B 1/08 (2006.01)
CPC G10K 11/1787 (2018.01) [G10K 11/1783 (2018.01); H04B 1/086 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for dynamically changing reference sensors to be used for an active noise control of a vehicle according to a target zone and current noise characteristics, the method comprising:
obtaining, by a processor, a reference signal indicating vibration introduced from a road from each of sensors provided in the vehicle, and obtaining a noise signal indicating indoor noise from at least one microphone positioned in the target zone in a compartment of the vehicle;
determining, by the processor, a coherence value between the noise signal and a reference signal corresponding to each of the sensors, and selecting a sensor corresponding to a reference signal with a largest coherence value among the sensors, as a first entry of a candidate list;
repeating, by the processor, a process in which a sensor adding the largest coherence information quantity to a current candidate list among the sensors is selected as a new entry of the current candidate list, until a number of entries included in the candidate list reaches a preset number;
setting, by the processor, a reference sensor set which is to be used in the active noise control using sensors included in the candidate list, when the number of the entries included in the candidate list reaches the preset number; and
generating, by the processor, a noise control signal for the target zone based on reference signals obtained from the reference sensors corresponding to the reference sensor set.