The inner wall of the speaker is smooth. The sound radiation from the horn will be refracted through the inner wall of the speaker. The function of the absorbent melamine foam is to absorb the sound waves emitted by the speaker so that the sound waves are not refracted or reflected, ensuring that the sound confusion and blurring caused by the refraction and reflection of the sound waves no longer occur.
Due to the low-density melamine sponge (6-12KG / m) opening rate of 97%, the three-dimensional grid system (L / D phase grid length to diameter ratio of about 10-20) deep sound can quickly and efficiently enter the foam and The conversion to mesh vibration is consumed, effectively eliminating the radiated sound. These two rebounds reduce the sound. The ordinary foam is generally a semi-open structure, and the opening ratio is low, and a semi-closed pore structure occurs, and the semi-opening structure may seriously affect the sound insulation performance.
Product performance
l Sound insulation: NFC = 0.9;
l Insulation: thermal conductivity (0.031-0.035W / mk);
l Flame retardant: Class B1.
Usage: Electrical appliances, stereo speakers, headphones, etc