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    • 6. 发明授权
    • Sound absorbing device
    • 吸音装置
    • US4211303A
    • 1980-07-08
    • US888872
    • 1978-03-22
    • Carl MatthewsElizabeth de Recourt Martyn
    • Carl MatthewsElizabeth de Recourt Martyn
    • F01N1/24F16L55/033
    • F01N1/24F16L55/033
    • Acoustic energy is absorbed from a moving fluid by passing the fluid, which is typically a gas, through a liner comprising a closely woven textile-like material which serves as an acoustically transmitting inner lining. Anchored either directly or indirectly to the acoustically transmitting inner liner is a sound absorbing material the surface of which is covered with a multiplicity of fibers or filaments, each filament having one end attached directly or indirectly to the surface and its outer end free and contacting the inner wall of a casing in which the tube and sound absorbing material are contained. Automobile or marine mufflers or silencers effective in reducing or eliminating objectionable noise, but with only nominal back pressure, are disclosed.
    • 通过使通常是气体的流体通过包括用作声透射内衬的紧密纺织的纺织品材料的衬垫从移动流体吸收声能。 直接或间接地锚固在声透射内衬上的是吸音材料,其表面被多根纤维或细丝覆盖,每根细丝的一端直接或间接附着在表面上,其外端自由接触 容纳管和吸音材料的外壳的内壁。 公开了有效减少或消除令人不快的噪音但仅具有标称背压的汽车或船舶消音器或消音器。