Numerical investigation on 2D metamaterial under normal incidence

Article Acoustics

Acoustic Attenuation of Hybrid Sonic Crystal Made with Periodic Cylindrical Scatterers and Porous Panels

Karisma Mohapatra et al.

Summary: This paper investigates acoustic attenuation of a hybrid sonic crystal made with periodic cylindrical scatterers and cascaded porous panels in a broad frequency range. The key finding is that introducing cascaded porous panels within scatterers can turn the passband in post first Bragg resonance into a stopband. The potential of said claim is demonstrated by investigating a multi-resonant array of scatterers with cascaded porous panels.

ACOUSTICS AUSTRALIA (2021)

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Article Acoustics

Noise control of outdoor unit of split type air-conditioner using periodic scatterers made with array of Helmholtz resonators

J. Dandsena et al.

Summary: The study proposed the use of a multi-resonant scatterer in a sonic crystal to reduce low frequency noise of split type ACs, achieving a reduction of approximately 7 dB in overall noise levels near the outdoor unit.

APPLIED ACOUSTICS (2021)

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Article Acoustics

Experimental study on the insertion loss of multilayer panels featuring a periodic structure

Preeti Gulia et al.

Summary: The study investigates sound propagation through multiple panels, and the novel acoustic panel design effectively enhances sound reduction while panels with air cavities suffer from insertion loss issue.

BUILDING ACOUSTICS (2021)

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Article Physics, Applied