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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..
.