Acoustic

Acoustic may mean:

In science:
 Acoustics, a branch of physics that studies sound
 Musical acoustics, the branch of acoustics that studies the physics of music
 Acoustic meatus, another name for the ear canal

In music:
 Acoustic music, music that solely or primarily uses instruments that do not need electric amplification to make a sound
 An instrument used in acoustic music (see link above), such as:
 Acoustic guitar, as opposed to electric guitar
 Acoustic bass guitar, as opposed to electric bass guitar
 An album:
 Acoustic (Deine Lakaien album), 1995
 Acoustic (John Lennon album), 2004
 A record label:
 Acoustic Americana
 Acoustic Disc
 Piano acoustics
 Acoustic fingerprint

Warfare
 Acoustic torpedo
 Acoustic signature

Other:
 Acoustic Control Corporation, a company which produced instrument amplifiers using Acoustic as a brand name
 Acoustic thermometry, observation of the oceans' climates using long-range acoustic instruments
 Acoustic cryptanalysis, in cryptography, a side channel attack which exploits sounds