What is the material of sound-absorbing cotton?

Question 1: What are the materials of sound insulation cotton? The so-called sound-insulating cotton is generally called sound-absorbing material in acoustics.

The cotton you mentioned belongs to porous sound-absorbing materials, which can be divided into:

1. Fiber materials: such as felt, glass wool, rock wool, environmental sound-absorbing cotton (polyester fiber cotton), etc.

2. Granular material: perlite sound-absorbing board, etc.

3. Foam materials: polyurethane foam, sponge, etc.

4. Metal materials: foam fiber aluminum plate, etc.

Question 2: What is the difference between sound-absorbing cotton and sound-insulating cotton? Sound-absorbing cotton has the function of silencing sound, that is, it converts sound energy into heat energy. Sound insulation materials do block the spread of sound, but it is easy to cause sound energy reflection.

Good sound-absorbing and sound-insulating materials, for example, our main purpose is sound insulation, which means "eliminating" noise in plain English. For example, "gradient sound-absorbing cotton" is a kind of laminated porous material with gradient density, and the holes in it are connected. After the sound enters, it rubs against the hole wall of the material, and the energy is converted, and finally the purpose of attenuating acoustic energy is achieved.

You can stick the soundproof cotton directly on the glass wall. If you choose the right material, it should be effective. There are two situations in you: one is that the material used has no influence, which is related to the material and structure. You will find that using gradient sound-absorbing cotton can produce results; In another case, that is to say, the normal installation method of sound insulation cotton should be filled in the keel and then sealed with wooden boards. That is to say, the installation can maximize the effect. If good materials such as gradient sound-absorbing cotton are used, the direct pasting method can take effect. Of course, there is still a difference between the sound insulation effect and the keel installation method. Of course, you can also choose high-barrier acoustic felt, and the sound insulation effect of this material is also quite remarkable.

Question 3: The difference between sound-absorbing cotton and sound-insulating cotton. Sound-absorbing cotton has the function of silencing sound, that is, it converts sound energy into heat energy. Sound insulation materials do block the spread of sound, but it is easy to cause sound energy reflection.

Good sound-absorbing and sound-insulating materials, for example, our main purpose is sound insulation, which means "eliminating" noise in plain English. For example, "gradient sound-absorbing cotton" is a kind of laminated porous material with gradient density, and the holes in it are connected. After the sound enters, it rubs against the hole wall of the material, and the energy is converted, and finally the purpose of attenuating acoustic energy is achieved.

You can stick the soundproof cotton directly on the glass wall. If you choose the right material, it should be effective. There are two situations in you: one is that the material used has no influence, which is related to the material and structure. You will find that using gradient sound-absorbing cotton can produce results; In another case, that is to say, the normal installation method of sound insulation cotton should be filled in the keel and then sealed with wooden boards. That is to say, the installation can maximize the effect. If good materials such as gradient sound-absorbing cotton are used, the direct pasting method can take effect. Of course, there is still a difference between the sound insulation effect and the keel installation method. Of course, you can also choose high-barrier acoustic felt, and the sound insulation effect of this material is also quite remarkable.

Question 4: What is the sound insulation cotton of environmentally friendly polyester fiber sound insulation cotton? 100% polyester fiber is an efficient sound-absorbing and heat-insulating material which is closest to nature, harmless to human body and pollution-free to the environment. Environmental-friendly polyester fiber is formed by laminating and hot-pressing bonding. Through the unique high-density tissue of the fiber, the sound can flow back in its cavity, effectively achieving the function of sound absorption and noise reduction. The biggest difference between it and traditional sound insulation materials is that it is environmentally friendly and harmless, has strong sound absorption ability, has no peculiar smell, is harmless to human body (does not itch), has uniform thickness, absorbs sound, has soft hand feeling, flat surface, good longitudinal and transverse strength and good sound absorption effect.

Question 5: What is the material of soundproof cotton? The principle of sound insulation cotton is that objects vibrate to produce sound → sound waves propagate in the air → cotton has a multi-fiber structure → when sound waves pass through cotton, they are reflected, superimposed and collided by countless fibers, and the sound wave energy is converted into heat energy → sound wave intensity is weakened → sound disappears.

Question 6: What's the difference between sound barrier and sound-absorbing cotton?

Panels made of soft fibers, PMMA or polycarbonate are often called sound insulation panels.

The sound insulation board made of PMMA or polycarbonate has the characteristics of aging resistance, high temperature resistance, transparency, light weight and convenient installation.

Furniture material is an artificial board made of wood or other plant fiber materials through chopping, softening, pulping, forming and hot pressing. There are three kinds: hard, semi-hard and soft. Hard fibreboard is hard and dense, and can be used as the material of automobiles, ships, furniture, interior decoration of houses and packing boxes. Soft fiberboard is light and porous, which is a good material for heat insulation and sound absorption, so it is also called "sound insulation board".

The main characteristics of sound insulation board: on the premise of ensuring sound absorption and sound insulation effect, it has the characteristics of simple manufacture and installation.

1, large sound insulation: the average sound insulation is 37dB. (Conditional sound-absorbing cotton 48K, thickness 95 × height 500 × length 1000-3000)

2. High sound absorption coefficient: the average sound absorption coefficient is 0.84. (Conditional sound-absorbing cotton 48K, thickness 95 × height 500 × length 1000-3000)

3. Weathering resistance and durability: the product has water resistance, heat resistance and ultraviolet resistance, and its performance will not be reduced or its quality will be abnormal due to the change of rain temperature. The sound barrier of the product is made of resistance plate, galvanized resistance plate, glass wool and H steel column, and its corrosion resistance life is more than 15 years.

4. Sound insulation board is beautiful: you can choose a variety of colors and shapes to combine, and coordinate with the surrounding environment to form a beautiful landscape.

5. Economy of sound-absorbing board: Assembled construction can improve work efficiency, shorten construction time and save construction cost and labor cost.

6. Convenient sound insulation board: installed in parallel with other products, easy to maintain and update.

7. Safety of sound insulation board: Both ends of sound insulation board are connected and fixed with φ 6.2 steel wire rope to prevent secondary injury and personal and property losses.

8. Lightweight sound-absorbing board: Sound-absorbing board series products have the characteristics of light weight, with the mass of less than 20kg per square meter, which can reduce the bearing capacity of elevated light rail and elevated road and reduce the structural cost.

9. Fire prevention of sound insulation board: ultra-fine glass wool is used. Because of its high melting point and incombustibility, it completely meets the requirements of environmental protection and fire prevention laws and regulations, and the fire prevention reaches Grade A. ..

10, high strength: considering the different climatic conditions in different regions of China, wind load is fully considered in structural design. 1.0- 1. 6mm galvanized sheet is adopted, and grooves are pressed by numerical control equipment to increase strength, so that the product can resist typhoon 10- 12, and the compressive strength is 300kg/m2.

1 1. Waterproof and dustproof: The louver design fully considers waterproof and dustproof, and its angle is set at 450, which will not affect its sound absorption in dusty or rainy environment. Dust removal and drainage measures are set in the structure to avoid water accumulation in the components.

12. The sound insulation board is durable: the product design fully considers the wind load of the road, the impact safety of traffic vehicles and all-weather open-air corrosion protection. The product is made of aluminum alloy resistance plate, galvanized resistance plate, glass wool and H-beam column. The company guarantees that the products will not be corroded or deformed within 15 years, and the sound absorption and sound insulation effect will not be reduced.

Uses of sound insulation board: Sound-absorbing and heat-insulating cotton such as urban rail transit noise barrier, expressway noise barrier, indoor noise barrier, air conditioner, mechanical noise barrier, etc. is a kind of finished cotton with sound-absorbing and heat-insulating properties and fire-proof effect, which is made by mixing polyester fiber and low-melting-point fiber, opening, carding, netting and high-temperature box, and finally by acupuncture or hot air technology.

It has good sound-absorbing and heat-insulating effects, is environment-friendly, non-toxic and fire-proof, and is an ideal material for family or high-class hotel walls, which can not only achieve the effect, but also save the cost and is not easy to cause pollution.

Generally speaking, it can be made with a weight of 40g/m-2000g/m, a width of 0.5m-3.2m and a thickness of 0.5cm-20cm.

It is usually used for sound absorption of speakers, interior walls of houses, front covers of automobiles, roof covers of automobiles, and between sides and doors. It can also be used for some furniture and bedding.

Question 7: Are sound-absorbing cotton and sound-insulating cotton the same? Any substance has sound insulation effect, and the greater the density, the better the sound insulation effect.

All sound insulation cotton is just a name, not a function. The sound insulation cotton expressed in daily life is a kind of cotton substance that reduces the kinetic energy of sound. Because it reduces the kinetic energy of sound waves, so as to achieve the effect of noise reduction/sound insulation, it is often called sound insulation cotton.

And sound-absorbing cotton is a noun, whose name and function are relatively accurate, and its function and effect are also relatively matched. Through its own hitting state, it absorbs sound energy in penetration and rebound, thus reducing kinetic energy and achieving the effect of noise reduction. Which means absorbed. So this kind of cotton is called sound-absorbing cotton.

Question 8: What is the best material for sound-absorbing cotton? First, determine where you buy sound-absorbing cotton.

From the sound absorption effect, glass wool is the best sound absorption effect at present, but it is not very environmentally friendly. Generally used for tooling, not recommended for home improvement.

If you are making a recording studio, the flame-retardant sponge is the cheapest and top-grade, and you can choose pyramid sound-absorbing cotton or modeling sound-absorbing cotton.

Question 9: What is the principle of sound-absorbing cotton? The sound absorption principle of the sound-absorbing cotton is that when it is used as a sound-absorbing material, because the sound-absorbing cotton has numerous air micropores, it can buffer and absorb the sound waves reaching the sound-absorbing cotton, so that no sound waves will be reflected from the plane with the sound-absorbing cotton (because the reflected sound waves and the main sound waves will interfere with the original main sound waves due to different phases and time delays), so that the main sound waves can reach the "sound receiver" (such as human ears or microphones) more cleanly, and strive to maintain the sound source.

Question 10: What's the difference between sound-absorbing cotton and sound-insulating cotton? Sound-absorbing cotton has the function of silencing sound, that is, it converts sound energy into heat energy. Sound insulation materials do block the spread of sound, but it is easy to cause sound energy reflection.

Good sound-absorbing and sound-insulating materials, for example, our main purpose is sound insulation, which means "eliminating" noise in plain English. For example, "gradient sound-absorbing cotton" is a kind of laminated porous material with gradient density, and the holes in it are connected. After the sound enters, it rubs against the hole wall of the material, and the energy is converted, and finally the purpose of attenuating acoustic energy is achieved.

You can stick the soundproof cotton directly on the glass wall. If you choose the right material, it should be effective. There are two situations in you: one is that the material used has no influence, which is related to the material and structure. You will find that using gradient sound-absorbing cotton can produce results; In another case, that is to say, the normal installation method of sound insulation cotton should be filled in the keel and then sealed with wooden boards. That is to say, the installation can maximize the effect. If good materials such as gradient sound-absorbing cotton are used, the direct pasting method can take effect. Of course, there is still a difference between the sound insulation effect and the keel installation method. Of course, you can also choose high-barrier acoustic felt, and the sound insulation effect of this material is also quite remarkable.