Noise control devices such as panels and barriers, when of high efficiency, generally are of difficult acquisition due to high costs\r\nturning in many cases their use impracticable, mainly for limited budget small-sized companies. There is a huge requirement for\r\nnew acoustic materials that have satisfactory performance, not only under acoustic aspect but also other relevant ones and are of\r\nlow cost. Vegetable fibers are an alternative solution when used as panels since they promise satisfactory acoustic absorption,\r\naccording to previous researches, exist in abundance, and derive from renewable sources. This paper, therefore, reports on\r\nthe development of panels made from vegetable fibers (coconut, palm, sisal, and ac�¸a�´i), assesses their applicability by various\r\nexperimental (flammability, odor, fungal growth, and ageing) tests, and characterize them acoustically in terms of their sound\r\nabsorption coefficients on a scale model reverberant chamber. Acoustic results point out that the aforementioned fiber panels play\r\npretty well the role of a noise control device since they have compatible, and in some cases, higher performance when compared\r\nto commercially available conventional materials.
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