International Research Journal of Education and Technology

Teachers who taught fourteen weeks of online courses used E-software in this study.The purpose of this study was to learn about supervisors' thoughts Noise pollution is a major factor which affects the environment. As the diesel engines run on high compression ratio, they emit higher level of noise. According to the permissible limits for vehicle in India are 70 dB and for two-wheelers, it is 75 dB. Hence, it is required to reduce noise levels as per the CPCB norms. In order to reduce the exhaust noise, mufflers are designed which reduce the sound transmissions by the exhaust gases. Reduction of the noise is determined by the mufflers design and its working features. The mufflers also influence other characteristic of vehicles such as efficiency of fuel and emissions. Therefore, it is crucial that the muffler is analysed thoroughly before its fabrication and application. There are various factors which determine the performance of the muffler. These include transmission loss, insertion loss, back pressure and perforations. 

Keywords: Emerging Trends for Muffler, E-Business, E-commerce