Everything is waves it seems - fréquences and amplitudes are different, but cell oscillation, market, even the joys of music, and theme park rides - the things the brain needs and enjoys keep tickling it through wave action. Human behavior in groups and online as well. I’ve been doing experiments with https://www.wishlst.com and anything from color wavelengths to traffic patterns devolves to fourier-transform like math for multiple waves of people or light waves colliding.