Acoustic characterization of farm residues for sound absorption applications

Abstract

Synthetic materials used for acoustic absorption are now a days replaced by natural materials in order to improve the environmental health. In particular, The farm residues have been considered as valid raw material to manufacture sound absorbing panels with low cost. These materials have no harmful effect to human health, and are available in plentiful as waste product in agriculture farming cycle. Considering the Review of literature of previous studies carried out by many authors on acoustic performance of naturally available farm residues, this paper reports the acoustical performance of the some farm residues as Lobia shell, Coconut leaf, Urad dhal Leaf, Sugarcane Leaf and Maize. The Sound absorption coefficient for different samples with varying thickness have been measured. This study reveals that the Acoustic performance of the farm residues as absorption panel are appreciable in the mid-range of frequency spectrum considered for study. The Scanning electron Microscope images are also analyzed to understand the structure of the farm residues considered in this study.