Adaptive audio noise filter -Free.
Posted: Sat Feb 10, 2024 12:23 pm
Adaptive audio filters are noise reducers that continually measure noise and subtract this constant from the signal containing wanted audio with unwanted noise. They tend to work much better than static filters based on just removing frequencies not essential to successful copying of the signal. A simple example is the automatic notch filter, which detects a constant tone and then subtracts it. The notch filter is not so good with more than one or two tones for subtraction.
While much work has been done with such filters to clean up medical ECG recording: https://en.wikipedia.org/wiki/Adaptive_ ... e_filters ,
the principles are the same for audio processing, including echo suppression.
The basic premise behind an adaptive filter is that the noise is constant or repetitive, while the wanted signal is a varying waveform such as speech of a CW stream. The effectiveness of the filter depends on how well it can distinguish noise from signal, and continually learn and change it…login to view the rest of this post
While much work has been done with such filters to clean up medical ECG recording: https://en.wikipedia.org/wiki/Adaptive_ ... e_filters ,
the principles are the same for audio processing, including echo suppression.
The basic premise behind an adaptive filter is that the noise is constant or repetitive, while the wanted signal is a varying waveform such as speech of a CW stream. The effectiveness of the filter depends on how well it can distinguish noise from signal, and continually learn and change it…login to view the rest of this post