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Linear Programming: Optimization of Noise and Vibration Model in Passenger Car Cabin  

1 Zulkifli Mohd Nopiah, 2*Ahmad Kadri Junoh, 3Wan Zuki Azman Wan Muhamad,
4Mohd Jailani Mohd Nor, 5Ahmad Kamal Ariffin Mohd. Ihsan,
6Mohammad Hosseini Fouladi

1,4,5 Department of Mechanical and Materials Engineering, Universiti Kebangsaan Malaysia,
43600, Bangi, Selangor, Malaysia,
2,3 Industrial Mathematics Research Group (IMRG), Institute of Engineering Mathematics,
Universiti Malaysia Perlis, 02000,Kuala Perlis, Perlis, Malaysia,
6 Taylor’s University College,47500, Subang Jaya, Selangor, Malaysia,

1,*2,, 4,5

Abstract .Car cabin interior acoustical is one of the factors which may influence the flexibility of the driving. Basically the amount of discomfort depends to magnitude, frequency, direction and also the duration of exposed vibration in the cabin. Generally the vibration is caused by two main sources: engine transmission and interaction between tyre and road surface. The noise which produced by the car system can cause hearing impairment, hypertension, annoyance and sometimes can decrease the driving focus which may cause an accident. There are studies have been carried out to measure the annoyance level of cabin interior acoustical by defining particular index [16]. In this study the effects of vibration to noise in passenger car cabin were investigated. Vehicle acoustical comfort index (VACI) was used to evaluate the noise annoyance level and vibration dose value (VDV) was used to evaluate the vibration level. By using the changes trend of noise and vibration level depending to engine speeds, optimization model was proposed to optimize the vibration level in the passenger car cabin.
Keywords : Vibration; Sound Quality; Vehicle Acoustical Comfort Index (VACI); Vibration Dose Value (VDV)

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