Study on broadband low-frequency sound insulation of multi-channel resonator acoustic metamaterials
Chi Xu,
Hui Guo,
Yinghang Chen,
Xiaori Dong,
Hongling Ye,
Yansong Wang
Affiliations
Chi Xu
School of Mechanical and Automotive Engineering, Bengbu University, No. 1866, Caoshan Road, Longzihu District, Bengbu 233000, China
Hui Guo
School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, No. 333, Longteng Road, Songjiang District, Shanghai 201620, China
Yinghang Chen
School of Mechanical and Automotive Engineering, Bengbu University, No. 1866, Caoshan Road, Longzihu District, Bengbu 233000, China
Xiaori Dong
School of Mechanical and Automotive Engineering, Bengbu University, No. 1866, Caoshan Road, Longzihu District, Bengbu 233000, China
Hongling Ye
School of Mechanical and Automotive Engineering, Bengbu University, No. 1866, Caoshan Road, Longzihu District, Bengbu 233000, China
Yansong Wang
School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, No. 333, Longteng Road, Songjiang District, Shanghai 201620, China
A novel acoustic metamaterial structure, made up of both resonator and multiple channels, is proposed to insulate low-frequency broadband noises. Three bandgaps with a total width of 658 Hz can be obtained below 900 Hz when the structure appears as a single negative characteristic within specific frequency ranges. These bandgaps are caused by the standing-wave characteristics under the coupling action of the interior and exterior cavities and the multiple channels. By changing structural parameters and materials, the low-frequency broadband sound insulation performance of the structure can be improved. Experimental results further prove the sound insulation characteristics. The results obtained herein can be used as a guide toward achieving low-frequency broadband sound insulation using a lightweight structure.
