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.
If you want to filter high-pitched sounds you’ll need the low-pass however…