Index Noise Comfort Inside a Vehicle for the Passengers from Tire/Road Interaction
[1]
Shawki Abdelhady Abouel-seoud, Automotive Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt.
[2]
Mohamed Watany Mohamed Elsid, Automotive Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt.
[3]
Nagwa Ahmed Abdel-halim, Automotive Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt.
[4]
Eid Saber Mohamed, Automotive Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt.
[5]
Ahmed Sultan Abdallah, Automotive Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt.
Discuss the potential criteria formats that can account for the interactive effects of noise on human discomfort response. The influence of driving speed, inflation pressure, tire type, road surface and preload are analysed. Practical measurements inside the vehicle of tire noise (a key used judged comfortability) and vibration amplitudes were conducted during coast down driving procedure. It is necessary to investigate a method of predicting road noise from multiple surfaces based on vehicle vibration measurement of a single surface to the design criteria aimed to improve the structural acoustic behaviour, to comply with the increasingly restrictive ergonomic standard. The approach used to estimate the vehicle acoustic comfort index depends on the measured and predicted sound pressure level (SPL) at the driver's head position, where SPL was calculated from the vehicle floor vibration under the driver's legs region based on the sample acoustic theory. This paper presents an overview of this approach development including the methodology with unloaded engine (neutral gear). The results indicate that the proposed approach was sensitive to changes in individual parameters. Hence it is very useful for making ride comfort design tradeoffs and as a tool for comparative assessment of ride comfort.
Acoustic Cavity, Interior Noise, Interior Vibration, Comfort Index, Vehicle Body Surface
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