	US 11,725,981 B2
	Directional acoustic sensor, and methods of adjusting directional characteristics and attenuating acoustic signal in specific direction using the same
Sungchan Kang, Hwaseong-si (KR); Cheheung Kim, Yongin-si (KR); Choongho Rhee, Anyang-si (KR); and Hyeokki Hong, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on May 10, 2022, as Appl. No. 17/740,578.
Application 17/740,578 is a continuation of application No. 16/738,123, filed on Jan. 9, 2020, granted, now 11,359,960.
Claims priority of application No. 10-2019-0073751 (KR), filed on Jun. 20, 2019.
Prior Publication US 2022/0268624 A1, Aug. 25, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01H 3/00 (2006.01)

CPC G01H 3/005 (2013.01)

12 Claims

1. A directional acoustic sensor comprising:

a plurality of resonance units arranged to have different directionalities, the plurality of resonance units comprising a first resonance unit and a second resonance unit that are arranged to have an angle less than 180 degrees with respect to each other; and

a signal processor configured to adjust directional characteristics of a first output signal and a second output signal that are received from the first resonance unit and the second resonance unit,

wherein the signal processor attenuates an acoustic noise signal by calculating at least one of a sum of the first output signal and the second output signal and a difference between the first output signal and the second output signal at a predetermined ratio.