Author : Dhananjay D.Mahale, Shailesh L. Deshmukh, Sham H. Borkar, Anand A. Kadav and Ravikant K. Pakale

The Main drawback of IC engines is that it is a major causes Noise pollution. Due to this the reduction of exhaust noise from engines is, an important issue. By the Use of a muffler in the exhaust pipe is the most effective means of reducing noise. Considering various noise parameters produced by the engine some specific type of muffler requires .which have some specific design and construction. So the design of such type of muffler is the Main Aim of design of the muffler and it have the low sound level than the regular muffler. The High Performance engine require to have low back pressure and it is not much affected by sound level Back pressure of the engine is reducing the exhaust gas outlet and it also reduced the efficiency of the engine. So the design of the semi-active muffler can fill these drawback of the conventional muffler used which can reduced the back pressure on the engine.

Keywords: Noise, Pollution, semi-active muffler, Exhaust port, Fuel consumption