Does a more uneven surface on a sound-absorbing panel necessarily mean better sound absorption?
2026-07-28
Not necessarily. The key to sound absorption lies in the material's flow resistance, porosity, and the cavity behind it, not simply the surface design. Surface grooves or embossing (such as wide or thin stripes) primarily enhance diffuse reflection and slightly increase the effective sound-absorbing surface area, but the improvement in the sound absorption coefficient is usually within 5%-10%. Don't just look at the appearance; pay attention to the NRC value measured using the reverberation chamber method.