Množina: acoustics

ETYM Names of sciences in -ics, as, acoustics, mathematics, etc., are usually treated as singular. Related to -ics.
The study of the physical properties of sound.
The degree of sound. The nature, cause, and phenomena of the vibrations of elastic bodies; which vibrations create compressional waves or wave fronts which are transmitted through various media, such as air, water, wood, steel, etc.