Manufacturing Process of Sound Absorption Composite Planks

摘要: In this study, the basic material for sound absorption was porous nonwoven made of polyester and low-melting fiber. Nonwoven then attached with foam polyurethane as composite plank isolation. We used two microphone impedance tubes test INSTRON 5566 mechanical testing machine tensile test. The optimum coefficients 0.67 ± 0.008 obtained when density 1.0 Kg/m3 thickness 20 mm; Polyester were 9 layers; fiber 30 wt% 10 mm. Specimens maximum fracture stress it contained at 30~40 wt%. results study could be applied in partitions inside ships, vehicles or buildings.