| 摘要 |
FIELD: machine building.SUBSTANCE: soundproofing enclosure contains a shell installed on the antivibration mounting made in form of box framework. Between the framework walls a sound absorbing material inlocated, it contains smooth and perforated surfaces. Between the surfaces a soundproof structure out of three layers is located. The first layer is more rigid, solid and profiled and is fixed on the smooth surface. The second layer is softer than the first one, is intermittent and placed in the focus of the sound reflecting surfaces of the first layer. The third layer is made out of construction sealing foam, and is located between the first layer and perforated surface. The discontinuous layer is made in form of balls or ellipsoids of rotation, and is secured using rods rigidly connected with smooth surface by means of the fasteners in form of plates. One plate end is rigidly secured on the smooth surface, and second end is made in form of clamp enclosing the rod and tightening is by means of screw. The solid profiled layer is made out of the material which sound reflection factor exceeds the acoustic absorption factor. The profiles are made by the spherical surface connected with each other such that each profile creates solid dome profile.EFFECT: increased efficiency of sound absorption.5 dwg |
