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Title: Statistical modeling of tyre/road noise in Hong Kong
Authors: Hung, WT 
Mak, KL
Issue Date: 2015
Source: 44th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2015, 9-12 August 2015 How to cite?
Abstract: The paper describes the development of a simple statistical model to estimate tyre/road noise. For the first time, a total number of 5744 tyre/road noise measurements were collected using a Close-proximity vehicle, from 870 trials along 28 selected road sections on five surface material pavements between 2009 and 2012, to develop such a model in Hong Kong. Six parameters were found to be principle factors of tyre/road noise and were subsequently adopted in the model for predicting tyre/road noise. These parameters include vehicle speed, acceleration, ambient temperature, road temperature, road surface age and road gradient. Further analysis found that vehicle speed and absolute acceleration are the most significant factors at sound frequencies below 1000 Hz. For frequencies between 1250 Hz and 2000 Hz, the road gradient and surface age become more significant. Interaction effects between vehicle speed and absolute acceleration are found to be important for noise levels at frequencies below 1250 Hz. This statistical model was compared to a traditional logarithm speed model in estimating the instantaneous tyre/road noise level. The results show that the new model has more accurate prediction ability than the traditional logarithm speed model, especially for lower frequencies.
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