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Attention to Sound Absorbing Material

Date of release:2019-01-14 Author:吸音板 Click:

Attention to Sound Absorbing Material

According to the design requirements of building materials and the characteristics of sound absorbing materials, the selection and design of materials and shapes are carried out. Sound absorbing materials commonly used in buildings include foam plastics, urea formaldehyde foam, industrial felt, foam glass, glass wool, slag cotton, asphalt slag cotton, cement expanded perlite slab, gypsum mortar (cement and glass fiber), cement mortar, brick (clean water wall), soft board, etc., each kind of sound absorbing material has its thickness, bulk density, sound absorption coefficient and installation at all frequencies. Every situation has its own requirements, and the corresponding norms should be implemented. Installation effect must be taken into account for sound absorbing materials used in buildings.

Installation location

Installation of sound-absorbing materials in buildings, glass fibre sound-absorbing panels should be installed as far as possible on the surface of * easy to contact sound waves and reflections of many times, but also consider the uniformity of distribution, not all concentrated on the ceiling and walls. Most sound-absorbing materials have low strength. In addition to installation, attention should be paid to waterproof, anti-corrosion, moth-proof and other issues. The material with high sound absorption coefficient should be used as far as possible so that less material can be used to achieve better results.

Material selection

The materials used as sound absorbing materials should be non-flammable, insect-proof, mildew-proof, pollution-proof and hygroscopicity-low. Because the porous material is easy to absorb moisture and the size is easy to deform, the expansion problem should be paid attention to when installing.

Decoration of Materials

Sound-absorbing materials are installed on the surface of buildings.  Therefore, the coordination and decoration between the building and the building should be considered in the design and installation. When using decorative coatings, pay attention to not blocking the fine holes, so as not to reduce the sound absorption effect.

Characteristics of Material Structure

Some porous materials are used as sound absorbing materials. The name of the page is the same - porous materials, but the pore characteristics are completely different. Thermal insulation materials require closed and non-interconnected air holes, while sound absorption materials require open and interconnected air holes. The more such air holes, the better sound absorption effect, on the contrary, the worse thermal insulation effect. In addition, the distinction between sound-absorbing and sound-insulating materials should be made clear.  Sound-absorbing material is light, porous and loose, and its sound insulation performance is not good. According to the acoustic principle, the greater the density of the material (kg/m3), the less difficult it is to vibration, the better the sound insulation effect. Sound insulation effect of clay brick, reinforced concrete and other materials with desired density and heavy weight is better, but the sound absorption effect is not good.


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Key word:吸音板,玻纤吸音板,玻璃纤维吸音板

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