Transportation Noise and Vibration-Sources, Prediction, and Control
Sharad R. Mahajan1, Rahul D. Rajopadhye2
1Dr.Sharad R.Mahajan. Professor, Rajaram Shinde. College Of Engineering, Alore, Mumbai University, Chiplun ,India.
2Shri. Rahul D.Rajopadhye, Automobile Department, Mumbai University / Rajendra Mane College Of Engineering, Devrukh, India.
Manuscript received on October 20, 2013. | Revised Manuscript received on November 03, 2013. | Manuscript published on November 05, 2013. | PP: 151-155 | Volume-3 Issue-5, November 2013 . | Retrieval Number: E1947113513 /2013©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: A major part of the world energy consumption is related to transportation. The extensive use of automobile vehicles causes harmful effects on the surrounding environment. The 20-25% of the total greenhouse gas emission in industrialized countries is generated by transportation. Vehicle noise (NVH) is becoming the most important factor to customers. The transportation noise is one of the major sources of noise exposure in residential areas and causes substantial annoyance during night. Noise is unwanted sound; vibration is the oscillation that is typically felt rather than heard. Harshness is generally used to describe the severity and discomfort associated with unwanted sound and/or vibration, especially from short duration events. Considering this, many countries have implemented legislation limiting the noise levels in residential areas. For today’s compact era the trend towards compact power units is substantially increased resulting in components/vehicles running at higher level of noise and vibrations.Vehicle manufacturers work with noise and vibration control to fulfil legislation demands and to meet customer requirements. The exterior noise control work is mainly motivated by legislation demands while interior noise and vibration control work is motivated by driver and passenger noise and vibration comfort requirements.The motivation for reducing traffic noise is that it is the most important environmental noise source in Europe and in the rest of the world. About 25 % of the population in Europe is exposed to transportation noise with an equivalent sound level over 65 dB(A). At this sound level sleep is seriously disturbed and most people become annoyed .
Keywords: Transportation, Vehicle noise, vibrations, Vibration isolation, surface pavement.