Perception of Tire-Pattern Noise

Due to the increase of electric motor cars for preventing spread of carbon dioxide, noise atmosphere inside the car compartment is more important for the perception of tire-pavement noise. This paper describes the impression of pattern noise created by the tire thread pattern under real running condition. Our impression on tire-pattern noise is more prominent if the peak level of the pattern noise together with its frequency location and width of the peak. This paper deals with our impression on tire pattern noise how our impression vary with its peak level and frequency location.