US 12,135,233 B2
Acoustic noise detection method and system using vibration sensor to detect acoustic noise
Shih-Pin Chen, Taoyuan (TW); Wen-Lun Chien, New Taipei (TW); Chin-Fu Chiang, New Taipei (TW); and Chang-Sheng Lee, New Taipei (TW)
Assigned to BenQ Corporation, Taipei (TW)
Filed by BENQ CORPORATION, Taipei (TW)
Filed on Aug. 18, 2021, as Appl. No. 17/406,058.
Claims priority of application No. 202011300024.0 (CN), filed on Nov. 19, 2020.
Prior Publication US 2022/0155137 A1, May 19, 2022
Int. Cl. G01H 3/08 (2006.01); G01H 17/00 (2006.01)
CPC G01H 3/08 (2013.01) [G01H 17/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An acoustic noise detection method comprising:
performing a noise test on a sample in an anechoic room to obtain a set of sound pressure levels of the sample;
using a vibration sensor to obtain a set of structural vibration levels of the sample;
establishing a set of equalization parameters from differences of corresponding frequencies between the set of structural vibration levels and the set of sound pressure levels;
using another vibration sensor to sense vibrations generated by an object to generate a noise signal, wherein the sample and the object have identical hardware structure;
obtaining a structure vibration level spectrum from the noise signal;
using the set of equalization parameters and a set of A-weighting parameters to adjust the structure vibration level spectrum to generate a sound pressure level spectrum; and
using the sound pressure level spectrum to calculate a noise value of the object.