Article | REF: N3801 V1

Metal foams. Properties

Author: Yves GAILLARD

Publication date: June 10, 2015

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5. Sound and vibration insulation

When it comes to sound and vibration insulation, non-communicating cell foams generally offer the most interesting characteristics.

5.1 Phonic

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5.1.1 Absorption coefficient

The sound absorption coefficient indicates the amount of sound energy absorbed by the material. A material with an absorption coefficient of 0.9 absorbs 90% of sound, corresponding to a 10 dB change in sound level. Closed-cell foams have the best characteristics in this respect (figure

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Sound and vibration insulation