Sound Absorption

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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 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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