Green materials, either natural or from recycled materials, are becoming a valid alternative to traditional synthetic materials for sound absorption treatments. In particular, plant fibers are often considered a valid raw material for making sound absorbing panels at a reduced cost. Moreover, plant fibers often show good thermal insulation properties and have not harmful effects over human health. After a literature review about existing green acoustic materials, this paper reports the acoustical characterization of several natural fibers: kenaf, wood fiber, mineralized wood fiber, hemp, palm date fiber, cork, cane, cardboard, and sheep wool. The absorption coefficient of samples of the above-mentioned materials with different thicknesses was measured in the frequency range from 250 Hz to 2000 Hz. The flow resistance was also measured, and by using these physical properties, some preliminary considerations of the rea-sons which justify the acoustic behavior of the different materials are included.

CHARACTERIZATION OF NATURAL FIBERS FOR SOUND ABSORPTION

IANNACE, Gino;
2015

Abstract

Green materials, either natural or from recycled materials, are becoming a valid alternative to traditional synthetic materials for sound absorption treatments. In particular, plant fibers are often considered a valid raw material for making sound absorbing panels at a reduced cost. Moreover, plant fibers often show good thermal insulation properties and have not harmful effects over human health. After a literature review about existing green acoustic materials, this paper reports the acoustical characterization of several natural fibers: kenaf, wood fiber, mineralized wood fiber, hemp, palm date fiber, cork, cane, cardboard, and sheep wool. The absorption coefficient of samples of the above-mentioned materials with different thicknesses was measured in the frequency range from 250 Hz to 2000 Hz. The flow resistance was also measured, and by using these physical properties, some preliminary considerations of the rea-sons which justify the acoustic behavior of the different materials are included.
2015
978-88-88942-48-3
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11591/213090
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