SOUND-DEADENING SHEET FOR AUTOMOBILE, METHOD FOR MANUFACTURING SAME, AND AUTOMOBILE DASH SILENCER USING SOUND-DEADENING SHEET

A dash silencer is constructed by layering a front side layer formed from a porous material, an intermediate layer constructed by a film structure body and a rear side layer. The rear side layer has upper and lower side layer portions which are formed from porous and sound insulation materials respectively and layered on upper and lower side layer portions of the intermediate layer.