Mufflers

Silencer is also termed as muffler. It is a device used for reducing the noise emitted by exhaust of an internal combustion engine, which is a major source of noise pollution. The IC engines are used for various purposes such as, in power plants, automobiles, locomotives, and in various manufacturing machinery. The main drawback of these engines are the sound produced by engines. It becomes a more vital concern when used in residential areas or areas where noise creates hazard. Generally, noise level of more than 80 dB is injurious for human being. The main sources of noise in an engine are divided in two parts first is the exhaust noise and second is the noise produced due to friction of various parts of the engine. The engine exhaust noise is the most dominant.

Generally are of two types:

 Absorptive Muffler

Reactive Muffler

The mixed (absorptive and reactive) muffler is shown:

Mixed Muffler