Array Noise Reduction by Band Gap Design based on the Artificial Black-Body Structure
To solve the adverse effects of noise pollution on the living environment,based on the principle of phononic crystal band gap,inspired by the artificial blackbody structure,a bandgap noise reduction structure design with the open-tubular-array artificial blackbody structure is proposed.The interfer-ence cancellation between the arrays and the tubular structure is used to achieve the noise reduction effect.Using the methods of numerical simulation and experimental research,the influence of different factors on the noise reduction effect was compared and analyzed,and the parametric influencing factors were analyzed from the perspectives of crystal array arrangement,normal number of rows and opening an-gle.The results show that the array structure of the bandgap design can effectively reduce the noise.Among them,the transmission loss in the high-frequency band can reach more than 100 dB,and the low-frequency band can also reach 30～45 dB.This study is of important reference value for the design of noise reduction requirements in typical scenes.
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