- Referring to a sound that has no visually identifiable cause.
- Referring to Pythagorean disciples who for years listened to his lectures from behind a curtain, unable to see him.
- (music) Referring to pre-recorded music that is presented in concert using loudspeakers, e.g. some types of computer music.
From Latin acousmaticus, from Ancient Greek ἀκουσματικός (akousmatikos), from ἀκούω (akouō, “I hear”).