Sound insulation panels refer to boards with an average sound insulation level exceeding 30 decibels. Their sound insulation principle primarily relies on the reflection and attenuation of sound waves by high-density materials. When sound waves strike high-density materials, the energy is reflected back; for every doubling of surface density, the sound insulation effect can increase by approximately 6 decibels.
The core characteristics can be summarized as high density, tight sealing, and high sound insulation index. Specifically, the effective sound insulation material density is typically greater than 60 kg/m³, joints must be sealed to prevent sound bridging, and the sound insulation index of residential partition walls must reach STC50 or higher.
Common sound insulation panel construction schemes include double-layer gypsum board with sound insulation felt sandwiched in between, or a multi-layer structure combining light steel keel with sound insulation felt and high-density foamed aluminum. Additionally, there are products composed of two high-density fire-resistant magnesium oxide boards sandwiching a high-adhesion asphalt felt.
Sound insulation panels must balance sound absorption and sound insulation effects, and also possess characteristics such as environmental friendliness, fire resistance, good weather resistance, and easy installation. However, it should be noted that the elasticity of some sound insulation panels made of rubber or other sandwich materials will weaken as the materials age, resulting in a decline in sound insulation performance over time.
