Energy can neither be created nor dissipated, it can be transformed from one form to another.

Sound absorbers can convert excess sound energy in the space into other harmless forms. The sound is produced by the vibration of air particles, and the sound absorber converts the vibration energy of the particles into heat energy to reduce the sound.

There are 3 types of sound absorbers: porous sound absorbers, plate sound absorbers and resonant sound absorbers.