Sound absorbing material

摘要

A sound-absorbing material, wherein a non-woven fabric with a mass per unit area of 150 to 800 g/m² and a bulk density of 0.01 to 0.2 g/cm³ and a surface material with an air permeability of not more than 50 cc/cm²/sec measured according to JIS L-1096 are layered.