Behaviour of Sound in a Room
A knowledge of the behaviour of sound in a room is necessary if we wish to adapt the room for speech or music and
if we want to attenuate external noise. Consider the effect
of placing a sound source in a room. When sound energy
(E i ) from the source strikes a room boundary, the reflected
sound energy (E r ) contributes to the sound-field in the
room, the absorbed sound (E a ) dissipates as heat, and the
transmitted sound energy (E t ) propagates away through the
boundary layer.
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