The objective of this paper is to compare the site-to-site variability of ISO 10844 pass by the noise test sites. In order to investigate the site-to-site variance of test surfaces, European commercial tires are tested at seven different test sites. Three Korea test sites and four Europe test sites are selected. The pass by noise test is done according to a 2001/43/EC regulation. Although the ISO surface has a very specific track composition, it does not reduce the variation of pass by noise measurements over the surface of test sites. This paper shows that the test results of pass by noise level are different depending on the test sites. The correlation obtained in this work is able to predict the pass by noise level for certain test site using the data measured from another test site. The prediction value is range with an error within 1dB(A).

A deformation of tire structure cause characteristic change of tire as stiffness, ground surface shape, vibration and noise. As a result it will affect "riding quality" factors such as noise and vibration. In this study, figured it out the difference of tire pass by-noise according to ground pressure and stiffness change, to investigate the influence of tire characteristic for tire pass-by-noise. Therefore, The tire ground stiffness and tire pass-by-noise was measured according to pass-by-noise test method(ECE R117). Conclusively, “The tire pass by noise” was confirmed that between vibration and tread shoulder are a close relationship. As the tire shoulder vibration is low, “The acceleration pass-by-noise” can be seen that displayed lower value. In order to distribute contact pressure low for reduce the acceleration pass-by-noise, it could be confirmed that the shoulder stiffness should be greater.

The objective of this paper is to compare the site-to-site variability of ISO 10844 pass by the noise test sites. In order to investigate the site-to-site variance of test surfaces, European commercial tires are tested at seven different test sites. Three Korea test sites and four Europe test sites are selected. The pass by noise test is done according to a 2001/43/EC regulation. Although the ISO surface has a very specific track composition, it does not reduce the variation of pass by noise measurements over the surface of test sites. This paper shows that the test results of pass by noise level are different depending on the test sites. The correlation obtained in this work is able to predict the pass by noise level for certain test site using the data measured from another test site. The prediction value is range with an error within 1 dB(A).