Someone who studies the physics of sound waves is a 1. Ethnomusicologist 2. Music theorist 3. Musicologist 4. Accoustician

Answer 1

Someone who studies the physics of sound waves is typically referred to as an acoustician. Therefore, the correct answer is 4. Acoustician.

Ethnomusicologists study music in its cultural context, music theorists analyze musical structures, and musicologists generally study the history and literature of music.