A soundproof cover (1) which covers a target object (2) is provided with: a sound absorbing sheet (3) which is formed in a planar shape by means of a sound absorbing material and which covers the surface of the target object (2); and a reinforcing member (...

Sound absorbency is imparted on a panel, which has increased strength and rigidity, by laminating a foam resin that is not originally permeable and does not absorb sound, and surface sheets that are not originally permeable and do not absorb sound. A sound...

The sound attenuation system for motor vehicles comprises a flexurally stiff foil (30), a spring layer (10) joined to the foil, and means (50) for attaching the foil and the partially compressed spring layer to the vehicle bodywork.

A multi layer thermoplastic polymer alloy (220, 320) is provided. The multi layer alloy includes a skin of thermoplastic polymer alloy (20, 120) having non-polar segments and a tie-layer having non-polar segments and polar functional groups. The non-polar ...