Acoustic characteristic of pineapple leaf fiber

Hassan, Muhamad Haziq (2017) Acoustic characteristic of pineapple leaf fiber. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The current acoustic absorbers are made from synthetic materials is still applied comprehensively in building industry. These non-biodegradable materials are not only causing global warming and pollutions to the environment by increasing the CO2 in the atmosphere during its production, but it also give negative effect to the human. Thus, researchers have their attention to find sustainable and eco-friendly materials which have the potential to replace the synthetic materials to be an alternative sound absorber. Pineapple leaf fiber is biodegradable material and it is available in plenty quantity as agricultural waste in Malaysia. In this study, the sound absorption of pineapple leaf fiber (PALF) is investigated to be a sustainable acoustic material. A samples sound absorber from pineapple leaf fiber is fabricated with different thickness, masses are tested using impedance tube according to ISO 10534-2 to measure the sound absorption coefficient. The effects of fiber density (mass), thickness, air gap and fabric on sound absorption performance are investigated. The performance of the sound absorption coefficient increase at the high frequency region due to the increment of the fiber density. The increment of thickness, application of air gap and added a layer of fabric at the samples increase the sound absorption coefficient especially at the lower frequency region. From the experimental result, samples at thickness 30 mm to 50 mm showed a good sound absorption performance where the average absorption coefficient is 0.98 in average frequency above 1000 Hz.

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