Sound Insulation Performance of Foam Rubber Damping Pad and Polyurethane Foam Board in Floating Floors

Elastic materials can be used to improve the impact sound insulation performance of the floating floor. In this study, the foam rubber damping pad and polyurethane foam board were used to improve the sound insulation performance in floating floors; the main performance parameters such as thickness, dynamic stiffness, resonance frequency and damping ratio of the foam rubber damping pad and the polyurethane foam board were tested and analyzed under different loading systems. Besides, a reinforced concrete residential compartment was used as experimental background, the foam rubber damping pad and polyurethane foam board were used as elastic damping materials to form the different structures of floating floors with different thicknesses; then the impact sound pressure level and its variation rule were tested under different conditions, and the influence of the reduction of impact sound pressure level on the floating floor was compared and analyzed. The results show that before the pavement, the thickness of the polyurethane foam board is 2 times the thickness of the foam rubber damping pad in the natural state; After pavement, under the action of the load, the thickness of the polyurethane foam board is 1.39-1.42 times that of the foam rubber damping pad. The sound insulation and damping performance of the polyurethane foam board are lower than that of the foam rubber damping pad. When the thickness of the floating plate is increased from 32 to 80 mm, the sound insulation performance of the floating floor structure made of polyurethane foam board and foam rubber damping pad has a deterioration tendency. This study provides a basic reference for the sound insulation of floating floors with the foam rubber damping pad or polyurethane foam board as the elastic damping cushion.

Automated summary

This study investigates the use of elastic materials, including foam rubber damping pads and polyurethane foam boards, to improve the impact sound insulation performance of floating floors. The performance parameters of the damping pads and foam boards were tested and analyzed under different loading conditions. It was found that the thickness of the polyurethane foam board is greater than that of the foam rubber damping pad, and the sound insulation and damping performance of the polyurethane foam board are lower than that of the foam rubber damping pad. Increasing the thickness of the floating plate leads to a deterioration in the sound insulation performance of the structure made of polyurethane foam board and foam rubber damping pad. This study provides a foundational reference for the sound insulation of floating floors using foam rubber damping pads or polyurethane foam boards as elastic damping cushions.