Soundproof acoustic polyurethane foam(PU foam) material has the special concave-convex and honeycomb curved surface structure of the material can weaken the sound wave repeated reflection and reduce the noise transmission.Longwell foam provide you with custom manufactured acoustic foams optimized for your specific application, while offering flexible, effective sound insulation and acoustic protection solutions. They are used in industrial applications such as aggregates, generators and other machines. Our products also include airborne sound and footfall sound insulation for flexible use in building and room acoustics.