FIELD: acoustics.
SUBSTANCE: invention relates to industrial acoustics and can be used for machine drive noise reduction, lining of manufacturing facilities and in other sound-absorbing structures. Sound-absorbing construction for industrial premises contains a continuous and perforated surface, between which is placed a multi-layer sound-absorbing element, made in the form of three layers: a central layer of sound-reflecting material of a complex profile, consisting of uniformly distributed hollow tetrahedra, allowing to reflect sound waves incident in all directions, and sound-absorbing layers from materials of different density symmetrically adjacent thereto. Central layer is made with a perforation, which acoustically connects it to the sound-absorbing layers that are symmetrically adjacent to it from sound-absorbing materials of different density.
EFFECT: technical result consists in increasing the efficiency of sound attenuation and the reliability of the structure as a whole.
1 cl, 1 dwg
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