Broadband-Absorbers

The simplest way to absorb sound are so called broadband absorbers. They absorb sound in a very wide spectrum and are often characterized by a lower cut-off frequency which depends on the thickness of the material and the distance from the wall. Above this frequency, the absorption is usually 100%.

They are also called porous absorbers, because porous materials such as the Basotect G+ have a flow resistance that opposes the movement of air particles. This removes kinetic energy from the sound wave and converts it into heat.

- The thinner the material, the worse the effect at low and medium frequencies.

- If a room is only damped with thin absorbers such as nap foam or carpets,
there is hardly any effect below 3000Hz.

The result: an extremely unbalanced sound. Booming lows and muffled highs.