Composite sound absorbing and insulating board

Abstract

The invention discloses a composite sound absorbing and insulating board. The composite sound absorbing and insulating board has a multi-layer structure, wherein an air layer is arranged between two panel honeycomb sandwich layers, so that the respective obstructing wave troughs can be avoided, the integral sound insulation property of the board can be effectively improved, meanwhile, elastic damping layers are arranged between a fireproof layer and a sound absorption layer and between the sound absorption layer and a sound insulation layer, so that the sound insulation amount and sound insulation frequency can be further improved, the propagation of noise can be effectively obstructed, and the composite sound absorbing and insulating board has the advantages of large sound insulation amount, wide sound insulation frequency and good sound absorbing and insulating properties. Due to the adoption of the structural form that the air layer is arranged between the two panel honeycomb sandwich layers, the composite sound absorbing and insulating board also has the features that the strength is high, the weight is small, meanwhile, the weather resistance, the fireproofing property and the like are also excellent, and the composite sound absorbing and insulating board is suitable for vibration and noise reduction in various fields including buildings, ships, automobiles and the like, and is wide in application range.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction and noise reduction, and more specifically relates to a composite sound-absorbing and sound-insulating board. Background technique [0002] Noise pollution has become the main problem of environmental pollution control in the 21st century. How to meet the requirements of people not to be affected by noise and have a quiet and comfortable living and working environment, and how to improve the sound insulation capacity of the enclosure structure is an important aspect. From the point of view of the sound insulation mechanism of materials, any material has its own trough in the insulation of the sound wave spectrum. No matter how heavy the mass of a single material is, there is still insufficient sound wave insulation at a certain frequency, which restricts the improvement of its sound insulation. If two or more sound-absorbing and insulating layers with different physical properties are...

AI Technical Summary

Problems solved by technology

From the perspective of the sound insulation mechanism of materials, any material has its own trough in the sound insulation of the sound spectrum. No matter how heavy the mass of a single material is, there is still insufficient sound wave insulation at a certain frequency, which restricts the improvement of its sound insulation.

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