Innovative sound absorption technique: Step-shaped ceramic fiberboards with veneer attachment for walls

The subject of the present paper is improving sound absorption properties and protecting the dust generation of ceramic fiber boards. The two-microphone impedance tube method measured the sound absorption coefficient (SAC) of ceramic fiberboards (CFB) with different shapes and sizes. The wood veneer was used to cover the ceramic fiberboard (VCFB) surface to improve the wall's appearance and prevent dust generation. The step-shaped ceramic fiberboards with veneer attached (VCFBS) revealed improved SAC (.98, 2000 Hz) compared with CFB and VCFB. The noise reduction coefficient (NRC) and sound absorption average showed a 100% improvement compared to CFB. The surface morphology and air permeability were analyzed using a scanning electron microscope and a capillary flow porometer to correlate with the findings. Furthermore, the porosity and pore diameter of the CFB were also studied to gain a comprehensive understanding of its acoustic properties and sound absorption capabilities. Statistical T-tests revealed significant variations in the SAC (p ≤.005). Besides, the obtained SAC was compared with other reported sound-absorbing materials. These findings suggest that using step-shaped ceramic fiberboard covered with a wood veneer can significantly absorb sound and improve the living environment. This novel approach offers potential advancements in sound-absorbing materials for building construction.