General decoration building materials have a certain sound insulation effect, but the sound insulation effect is not good. The sound insulation materials mentioned here mostly refer to those materials that can strongly block noise. 1. Sound insulation felt: It mainly works in conjunction with gypsum board. It is used for wall sound insulation and ceiling sound insulation. It is also commonly used for sound insulation and damping of pipes and mechanical equipment. Indoor soundproofing felt is not felt. Felt is light and soft, while soundproofing felt is thin but heavy. Sound insulation felt is made of odorless EPDM rubber and more than a dozen other organic minerals in a certain proportion. It is black, environmentally friendly and has no odor. It has good sound insulation effect on both low-frequency and high-frequency sounds, and can effectively suppress various vibrations. spread. The thickness of indoor soundproofing blankets ranges from 1mm, 2mm, and 3mm. The material is also very flexible and can be bent at will. It is very convenient to use and is fireproof. 2. Sound-insulating coating: The main sound-insulating raw material of indoor sound-insulating coating is nano-multilayer structural material, with coating molecules sandwiched in the middle. The entire intermediate film is evenly distributed with sound-insulating micro-particles, which play a role in sound absorption and insulation by reducing the transmitted sound wave energy. There are also some sound-absorbing nanomaterials in the sound-insulating coating. The surface of the sound-absorbing nanomaterials is filled with small pores with a diameter of about 1um. The small pores go deep from the surface to the center. The volume of the pores accounts for about 50% of the particle area, and has good adsorption properties. 3. Sound insulation cotton: Indoor sound insulation cotton is a kind of sponge formed by special treatment of equipment. Its interior is full of small voids and semi-open pore structure, which can absorb a large amount of incoming sound wave energy, attenuate sound waves and reduce indoor reflection. Sound interference and reverberation. 4. Sound insulation panels: Sound insulation panels are generally made of high-density materials. The classification of building sound insulation projects can be classified according to the location of the sound insulation, the method of sound insulation, the sound insulation materials and types used, and can be divided into two types: building sound insulation and structure sound insulation. . If classified according to the location of sound insulation, it can be roughly divided into two categories: indoor sound insulation and outdoor sound insulation. According to the method of sound insulation, it can be divided into composite sound insulation and structural self-insulation.