Experimental Investigation of Sound Absorbing Materials

Abstract

AbstractNoise has become one of the four major pollution types in the world. Constant exposure to noises can cause all kinds of health problems such as hearing loss, cardiovascular disease and sleep disorder. Following paper investigates the ability of porous and solid materials to absorb the generated sound for different geometries. Many natural and synthetic material have been developed and tested for acoustic applications. Impedance tube is used to find absorption coefficient of specimen is tested experimentally and the research shows the peak of absorption coefficient changes with porosity and peak value affected with various geometrical shapes in specimens. Finally, we get the peak absorption coefficient in porous material than the solid geometry of same material. In this research, we study the different sound absorbing materials with different geometry and comparative study between the materials. A thorough analysis of the research on the future scope of work, issue statements and goals connected to converting two-wheelers with IC engines into electric two-wheelers. In accordance with our practical analysis, our bike come in second position in overall championship, it is found that motor of electric vehicle generates high frequency sound. The intensity of research and the development in manufacturing processes, we anticipate that the range of new sound absorbing materials will expand to manufacture the casing of motor over the next few years.KeywordsSound absorptionCarbon fibreElectric vehiclePollutionNatural and synthetic materialPorous material