US 12,243,507 B2
Gain adjustment in ANR system with multiple feedforward microphones
Masanori Honda, Northborough, MA (US); Ricardo F. Carreras, Southborough, MA (US); and Joseph H. Cattell, Somerville, MA (US)
Assigned to Bose Corporation, Framingham, MA (US)
Filed by Bose Corporation, Framingham, MA (US)
Filed on Apr. 19, 2023, as Appl. No. 18/136,569.
Application 18/136,569 is a continuation of application No. 16/423,776, filed on May 28, 2019, granted, now 11,651,759.
Prior Publication US 2024/0021185 A1, Jan. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G10K 11/178 (2006.01); H04R 1/10 (2006.01); H04R 3/00 (2006.01)
CPC G10K 11/17833 (2018.01) [G10K 11/17837 (2018.01); G10K 11/17853 (2018.01); H04R 1/1016 (2013.01); H04R 1/1083 (2013.01); H04R 3/005 (2013.01); G10K 2210/1081 (2013.01); G10K 2210/3028 (2013.01); H04R 2460/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving an input signal produced by one of a plurality of sensors of an active noise reduction (ANR) device;
determining a gain for the input signal based on:
a number of the plurality of sensors of the ANR device, and
a relationship between a likelihood of coupling to an acoustic transducer of the ANR device for each of the plurality of sensors, the likelihood of coupling being determined based on a known location of each of the plurality of sensors relative to an acoustic leakage point of the ANR device; and
applying the gain to the input signal to generate a drive signal for the acoustic transducer of the ANR device.