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Instability Mitigation in an Active Noise Reduction (ANR) System Having a Hear-Through Mode
Instability Mitigation in an Active Noise Reduction (ANR) System Having a Hear-Through Mode
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机译:具有听到听觉模式的有源降噪(ANR)系统中的不稳定缓解
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摘要
In one aspect a method that includes receiving an input signal captured by one or more first sensors associated with an active noise reduction (ANR) device, and processing the input signal using a first filter disposed in an ANR signal path to generate a first signal for an acoustic transducer of the ANR device. The input signal is processed in a pass-through signal path disposed in parallel with the ANR signal path to generate a second signal for the acoustic transducer, wherein the pass-through signal path allows a portion of the input signal to pass through to the acoustic transducer in accordance with a variable gain. One or more second sensors detect an existence of a condition likely to cause instability in the pass-through signal path, and in response, the variable gain is adjusted. A driver signal for the acoustic transducer is generated using an output based on the adjusted gain.
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