Room Acoustics concern the way sound is created, propagated, perceived, measured and modelled inside enclosures. Enclosures can be dwellings, offices, workshops, factory halls, lecture rooms, auditoria, concert halls, transportation terminals, etc.
One of the most important parameters in Room Acoustics is Reverberation Time. It is a measure of how long the acoustic energy emitted from sound sources inside a room will linger. In regular rooms with an even distribution of sound absorption, reverberation time is also a measure of absorption present inside the room.