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1. (WO2018183714) COMPENSATION AND AUTOMATIC GAIN CONTROL IN ACTIVE NOISE REDUCTION DEVICES

Pub. No.:    WO/2018/183714    International Application No.:    PCT/US2018/025196
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 30 01:59:59 CEST 2018
IPC: G10K 11/178
H04R 1/10
Applicants: BOSE CORPORATION
CATTELL, Joseph H.
O'CONNELL, Michael
CARRERAS, Ricardo, F.
WARKENTIN, David
Inventors: CATTELL, Joseph H.
O'CONNELL, Michael
CARRERAS, Ricardo, F.
WARKENTIN, David
Title: COMPENSATION AND AUTOMATIC GAIN CONTROL IN ACTIVE NOISE REDUCTION DEVICES
Abstract:
The technology described in this document can be embodied in a method that includes receiving an input signal representing audio captured by a microphone of an active noise reduction (ANR) headphone, and processing, by a first compensator, a first frequency range of the input signal to generate a first signal for an acoustic transducer of the ANR headphone. The method also includes processing, by a second compensator disposed in parallel to the first compensator, a second frequency range of the input signal to generate a second signal for the acoustic transducer. The first frequency range includes frequencies higher than the frequencies in the second frequency range. The method also includes detecting, by one or more processing devices, that the second signal satisfies a threshold condition, and attenuating the second signal responsive to determining that the second signal satisfies the threshold condition.