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AGG sand seamless sound absorption system is a new type of sound absorption material system based on the combination of AGG sand absorption substrate and AGG sound transmitting decorative coating. The main advantage of this system is that it can achieve seamless sound absorption over a large area, with adjustable mid to high and low frequencies, and can meet the needs of various spaces and surfaces, making it easy to shape. AGG sand absorbing substrates can be divided into: lightweight expanded sand, natural desert sand, and composite sand. Meets the A-level non combustible standard and E1 environmental protection level of China Building Materials Fire Protection Testing Center. Suitable for the use of building space walls and ceilings in public places such as conference centers, lecture halls, cultural and sports centers, sports halls, theaters, etc. AGG aggregate sand board has a density ranging from 100-1000kg/m ³, with commonly used thicknesses of 6mm, 8mm, 10mm, 15mm, 20mm, 25mm, and 50mm. The standard size is 600mm × 1200mm.

Material characteristics: Acoustic performance NRC ≥ 0.90, adjustable high, medium, and low frequency sound absorption characteristics; Excellent sound absorption performance when combined with cavities; Flat panel technology, not easy to shape; Meets the A-level non combustible standard and E1 environmental protection level of China Building Materials Fire Protection Testing Center; Has excellent insulation, environmental friendliness, moisture resistance, and deformation resistance. 
Suitable for use in public places such as conference centers, lecture halls, cultural and sports centers, as well as in building space walls and ceilings, with excellent decorative effects. 
Material specifications: AGG natural sand sound-absorbing base board has a density ranging from 300-800kg/m ³, with commonly used thicknesses of 8mm, 15mm, 20mm, 25mm, and 50mm. The conventional size is 600mm × 1200mm.

The sound absorption coefficient and characteristic curve of AGG seamless sound-absorbing board specimen specifications: 8mm AGG natural sand sound-absorbing base board (bulk density 300kg/m ³)+2mm AGG sound transmitting coating+50mm glass wool (bulk density 32Kg/m3, wrapped with glass wool cloth)+100mm cavity.