Pupils as well as teachers often complain of being extremely tired after sports lessons, even when said lessons were not of a particularly physical kind.
The reason is quite often that the sound level in the gymnasium is way above any reasonable level which leads rapidly to a feeling of tiredness and also increases tetchiness.

The system Sound² is well-suited for acoustically rehabilitating such rooms due to its extremely high effectiveness over the whole range of frequencies and its simple installation.

Because Sound² can be installed very quickly, the room can be used again within a few days and no further construction work is necessary.