US 11,756,522 B2
Noise masking method through variable masking sound level conversion
Jung-hwan Yi, Gimpo (KR); Chan-goo Kang, Suwon (KR); and Jong-Bo Kim, Seongnam (KR)
Assigned to Aquris Co., Ltd, Anyang (KR)
Filed by Aquris Co., Ltd, Anyang (KR)
Filed on May 17, 2022, as Appl. No. 17/746,659.
Claims priority of application No. 10-2021-64883 (KR), filed on May 20, 2021.
Prior Publication US 2022/0375447 A1, Nov. 24, 2022
Int. Cl. G10K 11/175 (2006.01); G10K 11/178 (2006.01)
CPC G10K 11/1752 (2020.05) [G10K 11/17821 (2018.01); G10K 2210/3023 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A noise masking method through variable masking sound level conversion, which is a method of masking target noise by transmitting a target noise level based on an ambient noise collected through a sensor to a control unit, generating a masking sound for masking the target noise through the control unit, and outputting the masking sound through an output device, the noise masking method comprising:
a target noise upper and lower limit level recognition step (S10) of recognizing a lower limit level and an upper limit level of the target noise;
a masking sound center level setting step (S20) of setting a center level of the masking sound based on the lower limit level and the upper limit level of the target noise recognized in the target noise upper and lower limit level recognition step (S10);
a masking sound upper and lower limit level setting step (S30) of setting a lower limit level and an upper limit level of the masking sound based on the center level of the masking sound set in the masking sound center level setting step (S20);
a target noise level detection step (S40) of detecting the target noise level by comparing the target noise with noise output as the masking sound in the ambient noise collected from the sensor;
a masking sound level adjustment step (S50) of adjusting a level of the masking sound to a level set in the masking sound upper and lower limit level setting step (S30) by determining a fluctuation trend of the target noise level through the control unit according to a level of the ambient noise collected in real time through the sensor;
a masking sound interval adjustment step (S60) of adjusting a level change interval of the masking sound by determining the fluctuation trend of the target noise level in performing the masking sound level adjustment step (S50); and
a masking sound output step (S70) of outputting the masking sound through the output device based on the level of the masking sound adjusted through the control unit in the masking sound level adjustment step (S50).