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What is the best material for sound absorption?
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In general, soft, pliable, or porous materials (like cloths) serve as good acoustic insulators - absorbing most sound, whereas dense, hard, impenetrable materials (such as metals) reflect most. How well a room absorbs sound is quantified by the effective absorption area of the walls, also named total absorption area.
What type of foam absorbs sound?
Asked by unknown
1 Answers
Closed cell foam has tightly-woven cells that produce a closed effect. Because of this, closed cell foam results in a denser material that works better at absorbing low-frequency noise
What is the difference between acoustic foam and regular foam?
Asked by unknown
1 Answers
Acoustical foam is made to a firmness that offers the best absorption across all frequencies, as greater ILDs (firmer foam) absorb more low-frequency sound, and lower ILDs (softer foam) absorb more high-frequency sound. Comfort foam has a PPI of 60-70 cells and some porous materials have ratings low as 25 or 30 PPI.