ACOUSTIC PERFORMANCE OF NOISE BARRIERS WITH ACOUSTIC DIFFUSERS FOR HIGH SPEED RAILWAY

It is effective to solve the high speed railway noise problem by mounting the noise barrier at the side of the track. The performance of noise barriers largely depends on their profiles. This paper studied acoustic performance of noise barriers with quadratic residue diffusers for high speed railway. The properties of noise barriers are optimized based on acoustic diffuser theory. The insertion loss is simulated by establishing a numerical model to evaluate the acoustic performance of noise barriers. The introduced noise barrier is compared with the traditional rectangular and T-shaped noise barrier of the same height.