Glass wool is heat preservation and sound absorption material, we all know that glass wool is heat preservation material, but not necessarily someone knows another widely used glass wool sound absorption performance, mainly in order to reduce the indoor reverberation.  Glass wool is a porous material. After the sound is inhaled, the sound energy is converted into heat energy due to the friction and vibration of glass wool fiber, so that most of the noise is eliminated to achieve the effect of sound absorption and noise reduction. It is an essential material for building noise reduction engineering.  

What is the sound-absorbing effect of glass wool?  Here is to put forward a concept, glass wool sound-absorbing noise reduction index, which is replaced by the noise reduction coefficient NRC, the higher the index, the better the glass wool sound-absorbing noise reduction index.  The sound absorption and noise reduction index of high quality glass wool can reach more than 0.85, indicating that glass wool can eliminate about 85% of the noise, so as to achieve the effect of engineering noise reduction well.  

Some people will compare the sound-absorbing effect of rock wool and glass wool, it can be clear that the sound-absorbing effect of glass wool is better than that of rock wool. Rock wool relatively speaking, the material is generally greater than the density of glass wool, the material is dense, and the sound is difficult to pass in, so the sound-absorbing effect is not so good.  

Glass wool material is generally made of sound-absorbing board, soft bag, sound-absorbing ceiling, space sound-absorbing body and other products, widely used in concert hall, opera house, recording studio, cinema, KTV, office building and other scenes, can effectively eliminate indoor reflection sound, thereby reducing indoor reverberation, so that the sound can be heard more clearly.  Glass wool has sound absorption effect, in the heat preservation and sound absorption of hVAC duct, as well as sound absorption and noise reduction of mechanical and electrical equipment has also been fully applied.