SYSTEMS AND METHODS FOR ADAPTIVE NOISE CANCELLATION INCLUDING DYNAMIC BIAS OF COEFFICIENTS OF AN ADAPTIVE NOISE CANCELLATION SYSTEM

摘要

In accordance with the methods and systems of the present disclosure, the processing circuitry includes an adaptive filter with a response that generates a noise-preventing signal from a reference microphone signal to reduce the presence of ambient audio sounds heard by the listener, ambient audio sound in the error microphone signal. A coefficient control block shaping the response of the adaptive filter according to the error microphone signal and the reference microphone signal by adapting the response of the adaptive filter to minimize them, and the coefficient of the coefficient control block in a range of frequencies outside the frequency response of the source audio signal It is possible to implement a coefficient bias control block that biases them to zero.