Sound insulation board is a type of board used to block the transmission of sound. It achieves sound insulation by converting sound energy into heat energy through the density difference of the medium or the damping effect. The average sound insulation is 30dB. Due to the inherent resonant frequency of the object, the sound insulation effect of sound waves close to the resonant frequency is significantly weakened. According to the type of sound insulation, it is divided into air sound insulation board and vibration sound insulation board. The materials include high-density composite materials and environmentally friendly materials such as polyester fiber. It has fireproof, waterproof and sound absorption functions. The product specifications cover multiple sizes such as 600mm×600mm and are widely used in rail transit, highways, industrial equipment and building decoration.
The market size of China's building sound insulation materials reached 50 billion yuan in 2022, with an average annual compound growth rate of about 12%. Policies such as the "14th Five-Year Plan for Ecological and Environmental Protection" have promoted the industry to develop towards high performance and environmental protection [7]. Material innovation covers polyurethane foam, graphene reinforced board, etc., and the application scenarios have been expanded to intelligent products such as smart soundproof windows.
