acoustics
n. plural-onlyn. the way sound moves in a room or building. It describes how clear or loud music and voices sound in a specific space.
n. the properties or qualities of a room or building that determine how sound is transmitted in it. When referring to the scientific study of sound, it takes a singular verb; when referring to the sound properties of a space, it takes a plural verb.
The acoustics in this concert hall are amazing.
The architect worked closely with an engineer to improve the acoustics of the new theater.
While the cathedral's high ceilings create a beautiful sense of space, the acoustics are notoriously difficult for spoken word due to the long reverberation time.
From acoustic + -s.
Takes a plural verb when referring to the sound qualities of a room ('the acoustics are'). Takes a singular verb when referring to the branch of physics ('acoustics is').
The acoustics of the room is bad.The acoustics of the room are bad.When describing the sound quality of a specific place, the word is plural and requires a plural verb.