Application Research of Similarity Theory and Scale Model in Sound Barrier Noise Test
Yan Liu, Bing Kuan Yang, Xiaopai Zhang, Jitan Guo, Bin Huang, Lijuan Qu, Huayun Sun · 2010
The noise tests of the actual sound barrier and the scale model sound barrier are completed using the HEAD acoustics multi-channel noise test and analysis system based on similarity theory and model test knowledge. Comparison and analysis of the test results show that the scale model sound barrier has good consistency with the actual sound barrier in the frequency band from 125 to 5000Hz; the sound barriers have excellent noise reduction behavior for middle and high frequency noise, but the effect for low frequency is not good. The experiment results provide a high application value and practical significance for the future design of the sound barriers.