With room acoustics it is possible to change the reverberation time and room damping. The reverberation time of a room has a major impact on the understandability of speech, thus it has to be carefully taken into account when designing auditoriums or teaching facilities. The sound level in a room depends on the room damping. Noisy places, such as restaurants, kitchens, lobbies, halls, day nurseries and industrial buildings, can be made more comfortable with damping.