What's difference between Active NC and Adaptive NC

Also, if the pitch is not changing for a long time, the signal is considered to be the noise. Is these two subjects overlapping or in sub-relationship? Maurice Givens Givens Burnet, Inc. And could anyone give me some suggestions on choosing algorithm dealing with the 'stationary' noises whose amplitude and pitch change slowly compared to the spectral variations characteristic of human speech? Reply Start a New Thread.

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