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Ultra-thin rubber membrane could reduce air cabin noise 100 times.

Metamaterials (those engineered to give properties not found in nature) often contain polymers and rubbers.  Aircabin noise is characterised by a dull throbbing hum which can make sleep difficult. Recent research has developed a rubbery metamaterial which could reduce low frequency noise in aircraft by over 100 times.  The material is rather like the skin of a rubber drum and may be stretched over the lightweight honeycomb structure of cabin fuselage. The material has a remarkably small mass per unit area and has been proven in both concept and verified experimentally to muffle low frequency noise.

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Would this principle also apply to building acoustics? I am particularly thinking of low frequency sound from PA systems inside buildings....
Posted on 28/05/15 23:30.

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