Hard rooms

A room with little sound absorption, a “hard room” in which the surfaces reflect most of the noise.

In hard rooms, it is usually sufficient to have the reverberation time as the room acoustic descriptor. Both the sound level and the reverberation time here are more or less only dependent on the total sound absorption in the room. If the reverberation time and the sound effect that a sound source sends out into the room are known, the sound level in the room can be calculated. However, the hard room is, in reality, very rare.