Jute composite based single-leaf structure for sound insulation

The present study deals with the development of a mathematical equation that effectively predicts the sound insulationperformance of a single-leaf structure constructed using jute composites with varying resin uptake ratios. The investigationemploys a reference device to measure the transmission loss (TL) of sound energy as it propagates through a single-leafstructure. The objective is to investigate the impact of structural parameters, namely thickness, theoretical density, andcompaction factor, on the attenuation of sound waves within the frequency range of 50–3150 Hz. It has been revealed thatan increase in resin uptake, i.e. lower fibre content, is associated with a higher occurrence of voids inside the structure. Thepresence of voids inside the jute composites is inversely related to TL, while at a given fibre content, transmission loss islinearly related to the areal density of a single-leaf structure, regardless of the thickness of the jute composite. The derivedequation for predicting the transmission loss of sound propagating through a single-leaf is expressed as the modified masslaw of sound. This equation demonstrates that the mass of an individual leaf structure has a substantial effect ontransmission loss, surpassing the influence of frequency. The study provides evidence that the jute composite can beengineered to achieve a degree of transmission loss that is comparable to the materials commonly used for sound insulationapplications.