초록 ▼

Sound absorber comprising a large number of tubular resonators (10) whose sound orifices A.sub.o are adjacent to a common surface A and are distributed in such a way that the interaction zones A.sub.w of these individual sound orifices A.sub.o are distributed as far as possible over the whole surfac

Sound absorber comprising a large number of tubular resonators (10) whose sound orifices A.sub.o are adjacent to a common surface A and are distributed in such a way that the interaction zones A.sub.w of these individual sound orifices A.sub.o are distributed as far as possible over the whole surface and at the same time do not substantially overlap. Preferred embodiments consist of extruded plastic shaped parts (16) or of metallic shaped parts (7, 9) which are firmly connected to one another and have suitable mechanical rigidity and acoustic hardness.

대표청구항 ▼

[ I claim:] [1.] Sound absorber for noise reduction in vehicles, comprising several tubular resonators, whose sound apertures are adjacent to a sound-reflecting surface, characterized in that, the respective sound apertures are spaced from each other at least by the radius of the corresponding inter

[ I claim:] [1.] Sound absorber for noise reduction in vehicles, comprising several tubular resonators, whose sound apertures are adjacent to a sound-reflecting surface, characterized in that, the respective sound apertures are spaced from each other at least by the radius of the corresponding interaction region (A.sub.w), such that a destructive interference can occur between a wave reflected off the sound-reflecting surface and a wave being phased-shifted in the tubular-resonator, and such that the interaction regions do not substantially overlap other interaction regions, and that these interaction regions are distributed so as to cover the largest surface possible of the sound reflecting surface (A).