Psychoacoustics and "perceptual audio coding" are the search terms you were looking for, here's a couple of links: https://www.izotope.com/en/learn/psychoacous

Psychoacoustics and "perceptual audio coding" are the search terms you were looking for, here's a couple of links: https://www.izotope.com/en/learn/psychoacoustics-how-perception-influences-music-production.html https://www.izotope.com/en/learn/psychoacoustics-how-percept... https://www.i-programmer.info/babbages-bag/1222-mp3.html https://www.i-programmer.info/babbages-bag/1222-mp3.html http://www0.cs.ucl.ac.uk/teaching/GZ05/05-music-coding.pdf http://www0.cs.ucl.ac.uk/teaching/GZ05/05-music-coding.pdf