Sound absorbing board also known as egg cotton, wave cotton, wave peak cotton. It's a kind of sound-absorbing cotton. Egg cotton is a kind of sponge that is specially treated by the equipment to form a convex and concave wave shape. Its interior is full of small gaps and semi-open structure, which can absorb a large amount of incoming sound wave energy to attenuate the sound wave, reduce the interference and echo of indoor reflected sound, improve the purity of sound, and is a high-performance product of sound-absorbing bath materials.

Sound absorption principle
There are a large number of internal and external connected pores and bubbles, when the sound wave incident into them, it can cause the air vibration in the void; Due to the viscous resistance of the air and the friction between the air and the hole wall, a considerable part of the sound energy is converted into heat energy and is consumed. In addition, when the air is adiabatic compressed, there is a constant heat exchange between the air and the hole wall, and a part of the sound energy is converted into heat energy due to the heat conduction effect. In order to achieve the sound buffer and sound absorption effect, the effect of sound absorption has an important relationship with the size of the opening hole and the thickness of the whole cotton, if it is too thin, it can only absorb a small part of the sound, in addition, the opening hole is not suitable and the opening is too large, too large will have no sound absorption effect, too small power too loud sound can not be overcome, in this respect, the work is suitable. Sound absorption cotton can also play some sound insulation effect, because when the sound is absorbed, it will have friction with the sound absorption cotton, which will buffer the action of the original sound, and reduce the penetration of the original sound, so that there is still an auxiliary effect for sound insulation, but the sound insulation also has to be professional sound insulation cotton is ideal.
Uses of cotton
The sponge is non-toxic, tasteless, environmental hygiene, is the ideal indoor sound insulation/sound absorption, audio reflection material; Widely used in recording studio, recording studio, audio room, audiovisual room, drum room, KTV, sound measuring room, speech room, broadcast studio, sound test room, acoustic laboratory, conference hall, studio, theater and other occasions of interior decoration, as well as computer room muffler, generator set muffler, sound box and other sound-absorbing muffler places used.