① First, sound-absorbing properties, the use requirements, if asked to reduce high frequency noise or decreased HF reverberation time, you should use high frequency sound absorption coefficient of the material. If you want to reduce the low frequency noise or low frequency reverberation time, you should use low-frequency sound absorption coefficient of the material.
II sound absorption coefficient by environmental effects and time, sound-absorbing materials should maintain a long-term, stable and reliable performance.
Third, waterproof, moisture-proof, moth, corrosion, mould and fungus, which is very important in moist environment under the conditions of use. If the swimming pool, underground works and wet areas.
④ fire performance, should have a flame retardant, flame retardant or fire performance. Public places such as theaters and subway projects should as far as possible the use of non-combustible materials.
⑤ sound-absorbing materials should have a certain degree of mechanical strength for handling, installation and during use, difficult to damage, durability, anti-aging.
⑥ materials good processability, light weight, easy to process installation and maintenance replacement for large lightweight structures such as large-span stadium roof and weight are critical of its sound-absorbing ceiling constraints.
Sadly, sound-absorbing material and its products in the construction and installation and during use do not scatter dust, odor of volatile toxic, harmful substances, radiation damage to human health.
⑧ sound-absorbing material is usually installed on the indoor surface, it is an important part of Interior design, in particular cinema, function rooms, conference rooms, radio, television and film studios and shenting room acoustic design, sound-absorbing materials should have a decorative effect.