This is a weekend project for me - when I found that Krisp (and hence Discord) wouldn't support Linux, I set out attempting to create a user-friendly GUI which allows you to easily suppress background microphone noise. Do note that this is essentially just a GUI wrapper & nicer usage/installation experience for Werman's noise suppressor plugin for PulseAudio (https://github.com/werman/noise-suppression-for-voice).
The implications are rather ominous. It's difficult not to read "it's an engineered virus" into sentences like "similarity of novel inserts in the 2019- nCoV spike protein to HIV-1 gp120 and Gag is unlikely to be fortuitous" and "our findings suggest unconventional evolution of 2019-nCoV" - quoted directly from their conclusory paragraph.