Sound Absorption

Sound absorbing materials are used in various areas in order to reduce (absorb) air- borne noise within this area.

The below shown graph indicates the absorption co-efficient versus 1/3 octave frequency band in Hz.


Sound absorbing materials are very useful for high frequency noise and not so much for low frequency noise

Common areas to apply sound absorbing materials

Common used materials are:

- Open cell foam (no Armaflex)
- Rockwool or Glass wool
- Fire Master or equal

The above-mentioned materials must have an acoustic open finishing. No closed aluminium foil as this finishing reflects the noise instead of absorbing the noise.
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