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Acoustical Properties of Banana Midribs
Kusno A.
Aip Conference Proceedings
Abstract
Efforts on waste recycling as part of the green revolution are getting the attention of researchers specifically in the composite manufacturing fields. The requirements for modern building materials today include the acoustical characteristics of the materials which are able to absorb noises in a building environment. This study measured the sound absorption coefficient (a) of the composite made of banana midrib waste (BM) with two patterns of layering method i.e parallel and cross. The measurement results were compared with Glasswool (GW) as reference material. The measurement results show that the average a of the BM panel with the cross-layer arrangement (BMc) is relatively higher than the parallel layer arrangement (BMp), i.e. 0.85, 0.79, 0.79, and 0.77, 0.68, 0.73, respectively for thicknesses of 20, 40 and 60 mm. The comparison of a values of the two types of BM with GW shows the superiority of GW as an acoustic material with a difference of a <0.2 compare to the BM specimen. The results implied that, although BM has a relatively lower a value than GW, BM still has adequate acoustic characteristics to be used as an alternative acoustic material.