Acoustic Terms and Definitions: Reverberation time

Reverberation time or decay time is a measure of the time required for reflecting sound to "fade away" in an enclosed area after the source of the sound has stopped. Reverberation time is important in defining how a room will respond to acoustic sound.

The optimum reverberation time for a space in which music is played depends on the type of music that is to be played in the space. Rooms used for speech typically need a shorter reverberation time so that speech can be understood more clearly.

See also: what is "reverb"?

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