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the sound. By using perforated tube the back pressure will remain constant and fuel consumption remain constant and sound level is reduced. Back pressure is the extra static pressure exerted by muffler on the engine direct the restriction in the flow of exhaust gases. Also by using activated charcoal in water we can control the exhaust emission to a greater level it is smokeless and pollution free emission equivalent to the conventional silencer. International Journal of Advance Research in Engineering, Science Technology (ijarest). They compared the results between simple silencer and silencer with lime water and activated charcoal layer. The level of noise reduction depends upon the design, construction and the working procedure of muffler.
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The main source 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. In conventional silencer is sound level is 83db but in an aqua silencer is 75 db without any load. The muffler is engineered as an acoustic sound proofing device design to reduce the loudness of the sound. In the fully loading condition the conventional silencer give 86 db and in an aqua silencer is. They perform for three cases. It is used in both two wheeler and four wheeler. Around 50 load in conventional silencer it give.5db and in an aqua silencer give.5 db load. Maruthi Prasad Yadav. All Rights Reserved, @ijarest-2016 51, generally, noise level of more than 80-90 dB is harmful for human being. Many researches going on to improve on acoustics of automobile and perjure to improve the turning of the silencer.
Aqua silencer research paper