The prices of different brands and materials will be different. The price of indoor soundproof cotton is about 5- 15 yuan/square meter. For sound insulation materials, in order to weaken the transmitted sound energy and block the spread of sound, they cannot be porous, loose and breathable like sound absorption materials;
On the contrary, its material should be heavy and dense, such as lead plate, steel plate and other materials. Sound insulation materials shall be dense, without pores and gaps; It's very heavy. Because this kind of sound insulation material is dense, it is difficult to absorb and transmit sound energy, but the reflected energy is strong, so the sound absorption performance is poor.
Generally, the attenuation and absorption of incident sound energy by sound-absorbing materials are only a few tenths, so its sound absorption capacity, that is, the sound loss coefficient, can be expressed by decimals; The sound insulation material can attenuate the transmitted sound energy to 3/ 10 ~ 4/ 10 or less of the incident sound energy. For the convenience of expression, the sound insulation is measured in decibels.
Extended data
Matters needing attention
(1) When blanking, try to prevent excessive splicing and repeated blanking.
(2) Chassis wiring and air conditioning holes shall not be blocked.
(3) When disassembling, be sure to pay attention to disassembling skills, and don't use brute force to destroy the board surface and paint layer. All fasteners shall use special fastening tools.
(4) Pay attention to the strength and direction of force when handling attachments, so as not to scratch the paint and cut the panel. After using the cleaning agent, be sure to cover it in time to prevent the cleaning agent from evaporating or knocking over the cleaning bottle.