| 摘要 |
FIELD: construction.SUBSTANCE: invention relates to means of reducing noise in industrial and transport facilities. This is achieved in that in the piece absorbers, comprising a rigid perforated cage, within which is placed absorbent material, the frame is made of a bottom part of the conical shape with the lid and the upper part of cylindrical shape, which is attached to the cover bottom of the perforated framework by means of vibration damping pads allowing to dampen high frequency vibrations while the upper part of the cylindrical perforated frame pivoted element by means of which the frame is attached to a desired object, such as the ceiling of the production premises, and the cavities of the lower and upper portions of the perforated frame filled with sound-absorbing materials of different density, wherein around the upper part of the cylindrical shaped perforated frame is at least one sound-absorbing helical element piece absorber made in the form of a coil spring retardant dense absorbing material.EFFECT: improving the efficiency of noise reduction at low and medium frequencies.1 cl, 2 dwg |
