acoustics

American  

[uh-koo-stiks] / əˈku stɪks /

noun

1. (used with a singular verb) the branch of physics that deals with sound and sound waves.

2. (used with a plural verb) the qualities or characteristics of a room, auditorium, stadium, etc., that determine the audibility or fidelity of sounds in it.

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acoustics British  

/ əˈkuːstɪks /

noun

1. (functioning as singular) the scientific study of sound and sound waves

2. (functioning as plural) the characteristics of a room, auditorium, etc, that determine the fidelity with which sound can be heard within it

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acoustics Scientific  

/ ə-ko̅o̅′stĭks /

1. The scientific study of sound and its transmission.

2. The total effect of sound, especially as produced in an enclosed space.

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Other Word Forms

• hyperacoustics noun

Etymology

Origin of acoustics

First recorded in 1675–85; acoustic, -ics

Example Sentences

Recent tests reveal that some of these caves have surprisingly good acoustics.

From The Wall Street Journal • Jan. 23, 2026

The structure possesses a double power: phenomenal acoustics and, with its sheer beauty, the ability to trick us into thinking the chapel choir is better than it is.

From The Wall Street Journal • Jan. 23, 2026

There’s also an indoor pool, which Joel had covered up so he could use the space as a music room, because of its excellent acoustics.

From MarketWatch • Dec. 9, 2025

Their sonic range can go anywhere from mellow, feel-good acoustics to strained vocals over hard-hitting electric guitar riffs.

From Los Angeles Times • Apr. 6, 2025

I can't see either of them, but the acoustics are great.

From "Things Not Seen" by Andrew Clements