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.
Pretty much any audio editing or production software will have it. Audacity is a common free one, and it has a high pass filter.
Audacity has some privacy and licensing concerns, so people forked it and made Tenacity
Just in case that is of concern to anyone
If you want to filter high-pitched sounds you’ll need the low-pass however…
it has both, apologies I often mix them up like nearsighted and farsighted