Sound Insulation Principles Of PET Filament Sound Insulation Felt

Sound insulation felt primarily blocks sound by increasing mass; in accordance with the mass law, the greater the mass of a material, the more effectively it impedes sound transmission. Its high density increases the mass per unit area of ​​structures such as walls or floor slabs, thereby enhancing sound insulation performance-particularly against low- and mid-frequency sounds. Additionally, the felt utilizes its viscoelastic properties to generate a damping effect; this dissipates vibrational energy, suppresses structural vibrations (such as impact noise or equipment vibration), and prevents their conversion into airborne sound, thereby reducing both noise and vibration.
The primary function of sound insulation felt is to block sound transmission for isolation purposes, rather than to absorb sound or eliminate indoor reverberation; sound absorption typically requires the use of porous materials such as rock wool or polyester fiber batting.