Study on the Acoustical Properties of Natural Jute Material by Theoretical and Experimental Methods for Building Acoustics Applications

Assessment of the Measurement and Prediction Methods for the Acoustic Properties of Natural Fiber Samples and Evaluation of Their Properties

“…Furthermore, based on the normalized results of many natural fiber samples, an empirical model for the estimation of the SACs of porous samples is presented. It should be noted that, although there are various studies on the SACs of natural fiber samples (Bhingare, Prakash, and Vijaykumar 2019;Gokulkumar et al 2020;Kalauni and Pawar 2019;Liao, Zhang, and Tang 2020;Mamtaz et al 2016;Tang and Yan 2017;Yang et al 2020), limited number of studies have included the STLs of these materials (Bansod, Mittal, and Mohanty 2016;Bhingare and Prakash 2020;Zhu et al 2014). The STLs of some porous natural fiber samples are presented in Section 4.2.…”

Jute and Luffa Fiber-Reinforced Biocomposites: Effects of Sample Thickness and Fiber/Resin Ratio on Sound Absorption and Transmission Loss Performance

“…The temperature and air pressure during the acoustic experiments were 25°C and 101 kPa, respectively, and the universal gas constant is taken as 287 JK −1 kg −1 . It is worth stating here that the average diameter of the jute fibers is around 100 μm (Bansod, Mittal, and Mohanty 2016;Bevitori et al 2010). Hence, using these numerical values, the expressions above, and in the references (Allard and Champoux, 1992;Fouladi, Ayub, and Mohd Nor 2011;Johnson, Koplik, and Dashen 1987;Kino 2015;Kino and Ueno 2008), the SACs for the samples with 20 and 30 mm thicknesses are predicted using the DB and JCA models, and they are compared with the experimental results in Figure 12.…”

“…Another natural material, luffa, which is grown in many regions in the world, has attracted considerable attention from engineers and researchers in recent years (Alhijazi et al 2020;Koruk and Genc 2019). It is noted that jute has superior mechanical properties, high sound absorption coefficients (SACs), and transmission losses (TLs) (Bansod, Mittal, and Mohanty 2016;Ramesh, Palanikumar, and Reddy 2013), while luffa has high damping and SACs (Koruk and Genc 2015). Therefore, in order to utilize these two materials in practical engineering applications effectively, the acoustic performance of the composites of these two fibers with different thicknesses and fiber/epoxy ratios needs to be thoroughly investigated.…”

Rice husk and saw dust reinforced hybridized blends of bio-benzoxazine/epoxy based composites: Thermal, Mechanical, and Acoustic Absorption Properties

“…Natural waste have been widely used due to their inherent properties such as bio-degradability, renewability and their abundant availability, in addition to their light weight, carbon neutral and cost competitiveness. (Thyavihalli Girijappa et al 2019) , (Guna et al 2019) It was reported that the natural brous materials compete with synthetic materials with effective sound absorbing behaviour viz., barley straw, (Liuzzi et al 2020) ux, (Sair et al 2019) cotton, (He et al 2018) saw dust, (Bansod et al 2016) rice husk, (Taban et al 2019) hemp, (Liao et al 2020) palm, (Mohammed et al 2018) , (Belakroum et al 2017) kenaf, (Ismail et al 2019) corn, (Sari et al 2017) , (Binici et al 2016) paddy, (Marques et al 2020) sisal, (Tholkappiyana et al 2015) banana, (Singh and Mukhopadhyay 2020) and cork. (Trematerra and Lombardi 2017) Further, natural ber reinforced polymer composites have also received a lot of attention due to their lightweight, bio-degradable nature, eco-friendly nature.…”