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Sound absorption and insulation sandwich plate with labyrinth back cavity

A technology of sound absorption and sound insulation, sandwich panel, applied in the direction of sound-producing equipment, layered products, metal layered products, etc., can solve the problem of restricting the amount of sound insulation, to increase the sound absorption coefficient, increase the resonance efficiency, and increase the sound absorption frequency band. Effect

Active Publication Date: 2018-11-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the point of view of the sound insulation mechanism of materials, any material has a trough in the sound insulation of the sound spectrum. No matter how high the quality of a single-layer material is, it is not enough to block sound waves at some frequencies, which restricts the improvement of sound insulation.

Method used

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  • Sound absorption and insulation sandwich plate with labyrinth back cavity
  • Sound absorption and insulation sandwich plate with labyrinth back cavity
  • Sound absorption and insulation sandwich plate with labyrinth back cavity

Examples

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] Such as figure 1 As shown, a sound-absorbing and insulating sandwich panel containing a labyrinth back cavity is characterized in that it includes a labyrinth back cavity 4, and the front and back of the labyrinth back cavity 4 are sequentially stacked with a perforated plate 3 and a damping elastic layer 2 1. Mixed metal plate 1.

[0029] Such as figure 2 As shown, the perforated plate 3 is made of metal or non-metallic material, the perforation aperture is 0.5mm-5mm, the perforation rate is 0.1%-30%, the perforation distribution is uniform and the shape is circular or polygonal, and the apertures of each perforation are the same or different . The function of the perforated plate is to combine with the back cavity to form a resonant cavity structure, which converts the energy of the sound wav...

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Abstract

The invention discloses a sound absorption and insulation sandwich plate with a labyrinth back cavity, and the sound absorption and insulation sandwich plate comprises the labyrinth back cavity. Perforated plates, damping elastic layers and mixed metal plates are in turn symmetrically superimposed on the front side and the back side of the labyrinth back cavity. The labyrinth back cavity is with.The shapes of the labyrinth back cavity, the perforated plates, the damping elastic layers and the mixed metal plates are regular shapes or irregular shapes, and the regular shapes include a circle, an ellipse and a polygon. The labyrinth back cavity, the perforated plates, the damping elastic layers and the mixed metal plates are sealed with damped slurry to prevent leakage, and are connected andfixed together by bolts. Incident sound waves can be reflected multiple times inside a sound insulation layer, the sound insulation quantity can be significantly improved; the resonant cavity can beincreased while increasing of the resonance efficiency, and the sound absorption coefficient is enhanced; the sound absorption frequency band is increased and broadened; and the sound absorption coefficient can be increased while adjusting of the absorption frequency band.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing and insulating sandwich panels, in particular to a labyrinth-type resonant sound-absorbing structure and a variable-density metal sound-insulating panel. Background technique [0002] Noise pollution is the main problem of environmental pollution control. The method of reducing noise is of great significance to sound insulation engineering. From the point of view of the sound insulation mechanism of materials, any material has troughs in the sound wave spectrum blockage, and no matter how heavy the mass of a single-layer material is, there is insufficient sound wave blockage for some frequencies, which restricts the improvement of sound insulation. If two or more sound-absorbing layers with different material properties are used, their respective blocking bands can be avoided. At the same time, when sound waves enter another medium from a single medium, they will be reflected at the inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/00B32B15/06B32B25/00B32B15/092B32B27/38B32B15/04B32B33/00B32B25/04B32B27/06B32B3/24G10K11/168
CPCG10K11/168B32B3/266B32B15/00B32B15/04B32B15/06B32B15/092B32B25/00B32B25/04B32B27/06B32B27/38B32B33/00
Inventor 肖毅上官文斌邱志成
Owner SOUTH CHINA UNIV OF TECH
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