Sound absorption index of melamine  sponge

 Xiamen share nano sound-absorbing foam has a three-dimensional grid structure system with fully open cells. The length-to-diameter ratio L/D of the grid is between 10 and 20. Its extremely high open-cell ratio (up to 99%) makes the sound wave The vibration that can quickly and effectively enter the deep layer of the foam and transform into a grid is consumed, thereby effectively eliminating the reflected sound wave to achieve a sound absorption effect.

      The human ear can hear the sound frequency from 20Hz to 20000Hz, of which 500Hz to 2000Hz belong to the intermediate frequency sound wave, and the human ear is sensitive to this part of the sound wave. Xiamen Sihang sound-absorbing foam is extremely effective in absorbing medium and high-frequency sound waves, which is far better than common sound-absorbing materials such as glass wool; while in the lower frequency band, in order to achieve good sound-absorbing effects, the thickness of the sound-absorbing materials must be increased. The light weight of Sutai sound-absorbing foam is more prominent. The following are the sound absorption performance test data of Basotect melamine foam obtained by testing according to DIN52215 standard:

The absorption rate of Xiamen Sihang sound-absorbing foam with a thickness of 4cm can reach 50% for sound waves above 700 Hz, and the absorption rate for sound waves above 1500 Hz can reach 90%;

       The absorption rate of Xiamen Share nano sound-absorbing melamine foam with a thickness of 5cm can reach 50% for sound waves above 450 Hz, and the absorption rate for sound waves above 1000 Hz can reach 90%;

       The absorption rate of Xiamen Share nano sound-absorbing melamine foam with a thickness of 6cm can reach 50% for sound waves above 350Hz and 90% for sound waves above 800Hz;

       The absorption rate of Xiamen Share nano sound-absorbing melamine foam with a thickness of 8cm can reach 50% for sound waves above 250 Hz, and the absorption rate for sound waves above 600 Hz can reach 90%;

       Xiamen Share nano sound-absorbing melamine foam with a thickness of 10cm has an absorption rate of 50% for sound waves above 200 Hz, and an absorption rate of 90% for sound waves above 400 Hz.