| Autor: |
Ab Aziz, Shamsul Akmar, Gani, Adam, Suhaimi, Aizul Fazli, Kalil, Shamsiah, Md Yusuf, Aznida Yusufa, Nuawi, Mohd Zaki |
| Předmět: |
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| Zdroj: |
Defence S&T Technical Bulletin; 2017, Vol. 10 Issue 3, p290-296, 7p |
| Abstrakt: |
The present study provides an evaluation of cabin noise inside a passenger car cabin for two types of roads in tropical environmental conditions in Malaysia. Tropical weather conditions are hot and humid, with rain also giving effect to the road surface condition. Noise exposure was measured using a DuO sound level meter, which is capable to record sound pressure in unit of Pa, and comparisons were made between the two types of roads; tarmac and dirt. The data was analysed using Integrated Kurtosis-based Algorithm for Z-notch Filter (I-kazTM) in relation to varying speeds of the car, in order to determine the degree of data scattering for the noise signals. Based on the results obtained, noise exposure levels can be presented using sound pressure, sound pressure level (SPL), I-kazTM coefficient (Z∞) and I-kazTM display. Test comparisons were made between the two types of roads in the same test speed, which showed that the values of Z∞ and SPL were higher, and the size for I-kazTM display was larger for the dirt road as compared to the tarmac road. It was found that rough roads exhibit higher noise exposure variation as the vehicle speed changes in the tropical environmental condition. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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