Active Noise Cancellation in Automative Muffler

Abstract

In Day to day life our environment is getting more and more polluted and it is affected by noisier. Our people also adapted with this harsh environment so we need a new type of absorption material which is adaptive with this environment and which can be used in our vehicles to reduce the amount of noise produce by it. One of the type of abortive material is silicon carbidefoam and sound absorption material. For reducing the amount of noise emitted by the exhaust of an internal combustion engine.This noise is reduced as the transmission loss (TL) when the muffler increases. Various types of components are present in the mufflers like foam, sound absorption materials, silicon carbide filter etc., which can reduce the noise. This paper explains about TL characteristics and also different methods.