The difference between the simulated tread patterns’noise and the measured value was investigated by measuring the tread patterns’noise at the different indoor places.The test results showed that the wrong plan for lowering the tread patterns’noise would be obtained if the noise level was judged by the sound pressure level of noise measured only at one place because the emission of tread patterns’noise was similar to that of loundspeader sound and had strong orientation.So，a new method for measuring the tread patterns’noise in multi-directions was proposed.
