Sound absorption enhancement of nonwoven felt by using coupled membrane - sonic crystal inclusion

8th International Conference on Physics and its Applications

Fitriani, M.C.^1 ; Yahya, I.^1 ; Harjana^1 ; Ubaidillah^1 ; Aditya, F.^2 ; Siregar, Y.^3 ; Moeliono, M.^3 ; Sulaksono, S.^3

Iwany Acoustics Research Group (IARG), Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret, Central Java, Jalan Ir. Sutami 36A, Kentingan, Surakarta

57126, Indonesia^1

PT. Rekadaya Multi Adiprima, Jakarta, Indonesia^2

Textile Reseach Center (BBT), Bandung, Indonesia^3

关键词: Crystal formation;    Laboratory test;    Low frequency range;    Non-woven;    Sonic crystals;    Sound absorption;    Sound absorption coefficients;    Thin tubes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/776/1/012073/pdf
DOI  :  10.1088/1742-6596/776/1/012073

来源: IOP

【 摘 要 】

The experimental results from laboratory test on the sound absorption performance of nonwoven felt with an array thin tubes and sonic crystal inclusions reported in this paper. The nonwoven felt sample was produced by a local company with 15 mm in its thickness and 900 gsm. The 6.4 mm diameter plastic straw was used to construct the thin tubes array while the sonic crystal is arranged in a 4 × 4 lattice crystal formation. It made from a PVC cylinder with 17 mm and 50 mm in diameter and length respectively. All cylinders have two holes positioned on 10 mm and 25 mm from the base. The results show that both treatments, array of thin tube and sonic crystal inclusions are effectively increased the sound absorption coefficient of the nonwoven felt significantly especially in the low frequency range starting from 200Hz.