Study on broadband low-frequency sound insulation of multi-channel resonator acoustic metamaterials

Study on broadband low-frequency sound insulation of multi-channel resonator acoustic metamaterials

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A novel acoustic metamaterial structure, made up of both click here 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 soiebiologique.com 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.