Analisis Karakteristik Kebisingan Knalpot Komposit Pada Mobil Toyota Kijang Tipe 7K

Abstract: Problem this study is focused on the noise produced by the silencer of vehicle which can be very dangerous for our health especially  for the health  of those who live in urban areas. There have been many studies on  how to  reduce the noise of produced  by the silencer of vehicle conducted by the experts using various research methods such as by changing the construction form or by changing the material that can be  used  to  reduce  the  noise produced  by the silencer of the vehicle. In  this research,  the writer conducted a  study on how to reduce the noise produced by the silencer of a vehicle using of composite silencer of the same size and standard in reducing the noise produced by the silencer of Toyota Kijang 7K. The composite was  made  of  the Rockwool fibers and polyester resins (thermosetting) using the hand-lay up   method. The study was conducted in a laboratory using the laboratory equipment such as sound  pressure  level meter ,engine  tune-up  tester  (Okuda Koki ea-800a). The data of this study (the noise) was obtained through the hemispherical method with the distance of one meter from the silencer and divided into four point. The noise  measurement was done in the pivots of X+, X-, Y+ and Z- at each point by Sound Pressure  Level  Meter.  The  other data taken  were the temperature  and  the  velocity  of exhaust gas  flow on all of the  four  point. The data  obtained were analyzed  through  the software  of  Microsoft Excel. The result of this study shows the highest reduction of noise level (0.93 % = 0.18 dB).

Keywords: Noise Produced by Silencer, Composite of Silencer, Reduction of Noise Produced by Silencer

Penulis: Eka Sunitra, Mulyadi, Supriyadi

Kode Jurnal: jptmesindd090186

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