An ultra light, noise reducing composite (1) comprises an acoustically transparent, light weight film (6) between an underlay layer (5) and an air flow resistance layer (4). This composite allows to easily tune the acoustic properties by balancing the absorption and sound transmission behaviour of the composite (1). This air flow resistance layer (4) has an air flow resistance of between 500 N s/m3 and 10,000 Ns/m3 and an area mass between 200 g/m2 and 3,000 g /m2. The underlay layer (5) has a stiffness value in the range between 100 Pa and 100,000 Pa. The light weight film (6) may consist of a synthetic foil and preferably has a thickness of 0.01 mm.
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机译：一种超轻，降低噪音的复合材料（ 1 ），其在底衬层（ 5 ）和底衬层（ 5 ）之间具有透声，轻质的薄膜（ 6 ）。气流阻力层（ 4 ）。这种复合材料通过平衡复合材料（ 1 ）的吸收和声音传输行为，可以轻松调整声学特性。该气流阻力层（ 4 ）的气流阻力在500 N s / m3和10,000 Ns / m3之间，并且面积质量在200 g / m2和3,000 g / m2之间。底层（ 5 ）的刚度值在100 Pa到100,000 Pa之间。轻质薄膜（ 6 ）可以由合成箔组成，最好具有厚度为0.01毫米。
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