selection for Sound-absorbing material

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 The sound-absorbing material sound-absorbing material mostly for porous materials, such as slag cotton, blankets and so on, the sound absorption mechanism is sound material and deep pore, pore openings for internal hole are communicated with each other by the air molecules, friction and viscous resistance, and the fines for mechanical vibration, so that the sound energy into heat. The next Xiaobian to introduce what are the sound-absorbing material and sound-absorbing material selection.
What is the sound-absorbing material
The sound-absorbing material is all has the sound absorption property of the product ", who has the sound absorption performance of the products can be called sound-absorbing material. Generally the sound absorption coefficient is more than 0.3 of the material as sound absorption materials. The sound-absorbing material is the primary technical means building acoustics and noise control, its use is very extensive. In the building materials market, we can see a variety of styles with different properties of sound-absorbing material. The sound absorption performance of the material is related to the structure, thickness and the surface characteristics of the material, but also with the incident direction and frequency of the sound.
What are the sound-absorbing material
1, hemp: hemp is a relatively cheap sound-absorbing material, although it has sound-absorbing effect, but poor resistance to fire and moisture.
2, oil cotton fiber: this material sound-absorbing effect is relatively poor, not easy to absorb the high frequency noise, and the fire which melts.
3, sponge: sound-absorbing materials commonly used in the studio, easy to absorb dust, no flame retardant.
4, rubber plate, sound-absorbing the effect is very good, but the material itself is heavy, so the construction is somewhat difficult.
5, aluminum silicate cotton: refractory, not easy to absorb high frequency noise, and no water absorption, dirty, poor environmental protection.
6: industrial felt with fire prevention, anti-corrosion, the market price is relatively cheap, not suitable for indoor Home Furnishing, applies only to the car floor and ceiling.
7, modified sponge: modified sponge is improved sponge material, although the material in the water absorption performance has improved, but weakened the sound insulation and other functions.
8, industrial rubber plate: sound absorption, acoustic insulation and shock absorption ability, and the price is cheap, often used for insulation and air conditioning equipment industry in the construction industry. But the smell of this material is in want of perfection, so it's not suitable for indoor Home Furnishing.
9: asphalt asphalt plate, plate has good sound absorption effect, the price is cheap, but also has waterproof, shock absorbing effect. Of course, it also has some shortcomings, the asphalt board is not flame retardant, since the major, pollution, environmental protection is poor.
10, sound-absorbing coating: sound-absorbing material effect.
11, sound insulation felt: moisture proof, mothproof, flame retardant, sound insulation effect is good, but the material is no sound-absorbing effect.
12, styrofoam: the material no absorption function, but the fire sound-absorbing effect is good, the general effect, the price is too expensive.
13, polyurethane foam, sound insulation, sound-absorbing performance, and also has a waterproof, corrosion resistance and flame retardant function.
14, glass fiber cotton: the material has the advantage of good sound insulation performance, water absorption, and thermal insulation, is not easy to self ignition, moisture and corrosion protection; the shortcomings are not environmentally friendly, and now has gradually been eliminated by the industrial sector.
15, aluminum foil composite material: the quality of light, the reflection of the sound wave is good, the composite layer of the general water absorption, fire performance is poor, reflecting a large amount of heat.
16, foaming silicone rubber plate: fire, water, environmental protection, sound insulation and shock absorption effect, long service life; sound-absorbing performance in general, the price is high, the overall cost is not high.
Sound-absorbing material selection
1, the first sound-absorbing performance should be consistent with the requirements, if you want to reduce the high-frequency noise or reduce the high-frequency reverberation time should be used in high frequency, high material absorption coefficient.
2, the absorption coefficient is not affected by the environment and time, the sound absorption properties of materials should be to maintain long-term stable and reliable.
3, waterproof, moisture-proof, moth, anti-corrosion, anti mildew, which is very important for use in wet conditions. Such as swimming pool, underground works and humid areas.
4, fire performance is good, should have the flame retardant, flame retardant or non performance. In public places, theaters and subway engineering should as far as possible by using non combustible material.
5, have sound-absorbing material mechanics intensity and the order in handling, installation and use of the process, not easy to damage. Durable, not easy to aging.
6, material processing performance is good. Light quality to facilitate processing and installation and maintenance. The weight of the sound absorbing ceiling is the important factor for the large and thin roof structure to increase the span of the gymnasium.
7, sound absorption materials and products in the construction and installation and use of the process will not be scattered dust, volatile harmful gases, radiation harmful substances, damage to human health.
8, the sound-absorbing material is usually installed on the surface, it is an important part of interior design, especially the acoustical design of theaters, multi-function hall, conference room, radio, television and film studio and hearing room, sound-absorbing material should have a decorative effect..






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