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Noise reduction - Wikipedia
https://en.wikipedia.org/wiki/Noise_reduction#:~:text=Noise%20reduction%20is%20the%20process%20of%20removing%20noise,have%20traits%20that%20make%20them%20susceptible%20to%20noise.
How Audacity Noise Reduction Works - Audacity Wiki
https://wiki.audacityteam.org/wiki/How_Audacity_Noise_Reduction_Works
About the Noise Reduction algorithm The noise reduction algorithm uses Fourier analysis : it finds the spectrum of pure tones that make up the background noise in the quiet sound segment that you selected - that's called the "frequency spectrum" of the sound. That forms a fingerprint of the static background noise in your sound file.
Reducing noise - Audacity Wiki
https://wiki.audacityteam.org/wiki/Reducing_noise
Noise can often be reduced during post-production, by use of various plug-ins. Typically, they are fed a sample of the noise alone and then subtract that noise from the rest of the recording. To facilitate this, be sure to record a second or two of "silence" before you start the actual performance. This gives you a clean sample of the noise.
Audio recording application with noise reduction ...
https://safemodewiki.com/audio-recording-application-with-noise-reduction/
Hare, we have a list of audio recording apps with noise reduction. ASR Voice Recorder This application can skip the silent piece of voice mechanically; supports the blue tooth and also controls the playback speed of the voice. ASR records the voice in the form of FLAC, WAV, OGG, and M4A.
Noise Removal [Analog Devices Wiki]
https://wiki.analog.com/resources/tools-software/sigmastudio/toolbox/adialgorithms/noisereduction
The Noise Reduction algorithm is a “blind” processing function that operates automatically on an input signal to attempt to remove noise from the signal. When signal components are deemed to be not part of the desired signal, the algorithm will smoothly mute those frequency components until they are required again.
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