olemus
kuuldav võnkumine

Wiktionary:
noun
1. a sensation perceived by the ear caused by the vibration of air or some other medium
He turned when he heard the sound of footsteps behind him.  Nobody made a sound.
2. a vibration capable of causing such sensations

ülevaateid
https://www.nasa.gov/specials/X59/science-of-sound.html

https://en.wikipedia.org/wiki/Sound

https://citiesandmemory.com/types-of-sound/

https://www.ncbi.nlm.nih.gov/books/NBK207834/

https://justenergy.com/blog/sound-energy-everything-you-need-to-know/

vt ka
- akustiline kiirgus
- helirelv
- infraheli
- ultraheli