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The noise reduction coefficient (NRC) is generally between 0.7 and 1.10. Different thicknesses, densities, and installation methods will affect the specific value; high-quality products can achieve an NRC of over 0.95.

Density directly affects sound absorption and physical strength. Higher density means a denser material, resulting in enhanced absorption of low-frequency sounds; lower density panels are lighter, more breathable, and offer better mid-to-high frequency sound absorption. Common density ranges are 160-229 kg/m³, and the specific choice should be based on the application scenario.

The cavity in the back, and the spatial sound absorber formed by it, can greatly improve the sound absorption performance of the material. Filling the cavity with sound-absorbing cotton can significantly improve the sound absorption performance, especially the absorption of low-frequency sounds.

They exhibit significant absorption of mid-to-high frequency sounds (500Hz-4000Hz), with an absorption coefficient exceeding 0.7. This effectively reduces echo and reverberation, improving sound clarity. Within the 125Hz-4000Hz noise range, the absorption coefficient can reach a maximum of 0.8 or higher.

The primary function of polyester fiber acoustic panels is sound absorption, not sound insulation. If the thickness is 25mm or more, the density is high, and the gaps are sealed during installation, they can reduce some airborne noise, but they cannot block structurally transmitted sound (such as footsteps from upstairs transmitted through the floor). Sound absorption and sound insulation are two different acoustic concepts; please choose the appropriate product based on your actual needs.

The suitable installation environment is a temperature of 15-30°C and a humidity of 40-60%. Avoid installation on damp or undried walls to prevent the panels from warping or becoming moldy.