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Is the sound-absorbing cotton the same as the sound-absorbing cotton?

Sound-absorbing cotton is different from sound-absorbing cotton:
The absorbent cotton is mostly made of fiber, with a porous structure, which is quite fluffy. Its main function is to absorb the noise and reduce the noise.
Sound insulation cotton is mostly rubber material, closed hole structure, compared with porcelain solid, the main role is to block noise.
Sound-absorbing cotton and sound-proof cotton are indispensable in the construction of noise reduction. It is necessary to use them together when the requirement of noise reduction is high. Noise can be attenuated to a very small degree after multiple filters in the order of sound insulation, sound absorption and sound insulation.
In the use of building materials, "sound absorption" and "sound insulation" are completely different concepts and are often confused. Glass sliver, rock mineral wool type has a good sound absorption performance but the sound insulation performance is poor material has been mistakenly called "sound insulation materials," earlier, some acoustic board made of plant fiber as raw material which is named "sound insulation board" and used to solve the problem of sound insulation of buildings. This will not only lead to unclear understanding of the materials used, but also will not achieve the expected results when the materials are wasted. Therefore, it is necessary to further understand and clarify the two concepts of "sound absorption" and "sound insulation" in order to use materials reasonably and improve the noise control effect of buildings.



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