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.