re: #59 Quoth the raven, Covfefe.
Usually just a frequency analyzer, such as what I have on our sound board (or a more sophisticated version that I’ve seen on a mobile app, but I don’t trust my iPhone’s microphone that much). Find the pain point, and then adjust your room to amplify that specific frequency and you can make it _very_ painful.
I was joking about the gross exploding head scene in the movie. Seems on point (although taken to an extreme).