Investigation on the Sound Absorption Properties of Woven Ramie Fabrics

This paper presents a systematic investigation into the sound absorption properties of woven fabrics manufactured from natural ramie fibers. A series of samples were produced by varying key structural parameters, including weave structure, warp density, and weft linear density. The normal incidence sound absorption coefficient was measured over a frequency range of 100–6300 Hz using an impedance tube in accordance with ISO 10534–2. The results demonstrate that the acoustic performance is significantly influenced by warp density, weft linear density, and the specific weave structure. The optimal sound absorption performance was achieved with a warp density of 424 ends/10 cm, a weft linear density of 32.8 tex, a honeycomb weave, and a 9 cm backing air gap. This configuration yielded a maximum sound absorption coefficient of 0.83 ± 0.05at 1000 Hz and an average coefficient of 0.51. Furthermore, the introduction of a backing air gap was shown to substantially enhance low-frequency absorption. This study confirms the potential of ramie woven fabrics as sustainable and effective materials for noise control applications.