Comparative Study on Noise Reduction Effect of Sound Barrier Based on Statistical Energy Analysis

  • Jianjun Nie, Congyun Zhu, Rui Wu, Yanming Liu, Guofang Ding, Qibai Huang

Abstract

Based on statistical energy analysis (SEA), the noise attenuation effect of highway sound absorbing barrier is predicted. The theoretical formula value is compared with the calculated value of statistical energy analysis(SEA) to verify its effectiveness in the prediction of sound barrier. And the insertion loss of sound barrier of mineral wool with diverse material thicknesses and coverage are calculated. The results showed that the noise attenuation of the sound barrier increased by 1.5dB when the sound absorbing materials are attached to the sound barrier near the acoustic source. The noise attenuation effect of mineral wool is improved in the frequency band below 600Hz when the thickness is increased. The coverage of mineral cotton increased by 25%, and the noise attenuation increased by 0.4dB. Meanwhile, it also reflects the advantages of fast and convenient statistical energy analysis(SEA) -- only one time modeling and changing its parameters can obtain the corresponding statistical results, which has a excellent reference function.

Published
2020-10-31
How to Cite
Jianjun Nie, Congyun Zhu, Rui Wu, Yanming Liu, Guofang Ding, Qibai Huang. (2020). Comparative Study on Noise Reduction Effect of Sound Barrier Based on Statistical Energy Analysis. Design Engineering, 697 - 708. https://doi.org/10.17762/de.vi.848
Section
Articles