Can sponges really provide sound insulation
Mar 14,2025
1、 It can provide sound insulation, but the sound insulation is very poor. The sound absorption effect is good. Filling it inside the cavity can solve cavity resonance and absorb high, medium, and low frequency noise.
2、 Specific analysis and suggestions: sponge is one of foam (scientific name is polyurethane soft foam), but its density is low, it is easy to absorb water, its sound insulation effect is poor and it is flammable; I suggest you use polyurethane insulation board (polyurethane rigid foam), which is made from the same raw material as sponge, but with different production processes and materials used. It is currently the best insulation and sound insulation product (note to use flame-retardant), which is used as insulation and sound insulation material in high-end products such as cars, tanks, and airplanes.
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