The study on the tire noise due to the On-Board Sound Intensity test method. The object of this project is to prepare the countermeasure of the noise reduction according to collect tire/road noise data under various influencing factors by using On-Board Sound Intensity test method. To accomplish the object ; A automotive is used as a test platform to test tire/road noise by changing different types of tires and using On-Board Sound Intensity test system. The influence of inflation pressure, road, load, speed and pattern type on tire/road noise is compared and analyzed. At the same time, the mechanism of tire/road noise is analyzed, which provides a experimental basis for tire noise reduction.

ABSTRACT
 1. Introduction
 2. Test scheme
  2.1 OBSI Test System
  2.2 Test conditions
  2.3 Test methods
 3. Test results and analysis
  3.1 Tire/road noise analysis of a certain tire typeunder different inflation pressures
  3.2 Tire/road noise analysis of a certain tire typeunder different road structures
  3.3 Tire/road noise analysis of a certain tire typeunder different loads
  3.4 Tire/road noise analysis of a certain tire type atdifferent speeds
 4. Conclusions
 Acknowledgements
 References

• H. J. Ji(Department of Mechanical Engineering, Wonkwang University Graduate school) | 희홍걸
• C. Y. Wang(Department of Mechanical Engineering, Wonkwang University Graduate school) | 왕충렬
• B. S. Kim(Department of Smart Automotive Engineering, Wonkwang University) | 김병삼 Corresponding Author