If you ever do psychedelics, try out a tone generator while on the trip. https://www.szynalski.com/tone-generator/ https://www.szynalski.com/tone-generator/

If you ever do psychedelics, try out a tone generator while on the trip. https://www.szynalski.com/tone-generator/ https://www.szynalski.com/tone-generator/ In particular the 20-100 hz range. There's a simple explanation for all of this. The sound wave frequencies are about coincident with the brain wave frequencies used in representing conscious thought. Signals of audio and visual perception in the brain are meant to be similar, you want to recognize the same object as the cause of both light and sound signals. So perhaps information in the optical nerve is serialized in a manner that makes the wave form similar to sound waves coming from the same direction and same characteristic length scale. Of course on psychedelics you can use sound or perhaps even blinking lights to create erroneous perceptions.