Structured Assembly of Acoustic Materials for Mitigating Low-Frequency Broadband Aircraft Noise
Keywords:
Broadband, Low-frequency, Metamaterials, Aircraft NoiseAbstract
The challenge of attenuating low-frequency broadband noise is crucial in aeronautics, ground transportation, and construction industries, necessitating innovative solutions for improved acoustic control. This paper introduces a novel thin acoustic metamaterial design aimed at enhancing broadband noise attenuation at low frequencies. The design comprises structured metamaterials arranged in series and parallel within a fiberglass layer, optimizing resonant frequencies to create a band that maximally attenuates low-frequency noise. Using COMSOL Multiphysics finite element methods, the performance of this metamaterial was assessed, demonstrating wide frequency band noise attenuation at low frequencies and confirming its efficacy.
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