Something that lets me select a frequency above which all sounds would be filtered in real time? I don’t know if a software can separate the high pitched sounds from the rest of the sounds. If it was possible that would be perfect. If not just removing all sounds when any sound goes above the threshold.
If you have some programming skill you can write something yourself. You should use Fourier to get this done. FFT is an algorithm that would help a lot. If you know Python you can use an implementation of FFT in Numpy.
I’m not sure if you have to use FFT though. It might be better to just calculate it for certain frequencies which you need to remove. Either way you have to see which frequencies there are which you don’t need and remove them.
Underrated