Room acoustics describes how
sound behaves in an enclosed space.
The way that sound behaves in a room can be broken up into roughly four different
frequency zones:
The first zone is below the frequency that has a wavelength of twice the longest length of the room. In this zone, sound behaves very much like changes in static air pressure.
Above that zone, until the frequency is approximately 11,250(RT60/V)
1/2,
wavelengths are comparable to the dimensions of the room, and so room
resonances dominate.
The third region which extends approximately 2
octaves is a transition to the fourth zone.
In the fourth zone, sounds behave like rays of light bouncing around the room.