What question did this study set out to answer?

To develop a sector-shaped acoustic metamaterial capable of maintaining high broadband sound absorption across wide angles of oblique incidence.

August 14, 2026Journal of Applied Physics

A sector-shaped acoustic metamaterial for broadband and wide-angle sound absorption

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To develop a sector-shaped acoustic metamaterial capable of maintaining high broadband sound absorption across wide angles of oblique incidence.
Designed a sector-shaped structure integrating two-dimensional gradient waveguides arranged in a fan configuration with a porous backing cavity.
Conducted numerical simulations evaluating acoustic absorption across frequencies from 500 to 3400 Hz and incidence angles from 0° to 80°.
Compared acoustic performance against standard porous absorbers and sonic black hole structures under oblique sound incidence.
The metamaterial maintained high and stable sound absorption over a 500–3400 Hz frequency band for incidence angles ranging from 0° to 75°.
Effective sound absorption persisted under near-grazing incidence angles up to 80°.
The proposed design outperformed conventional porous absorbers and sonic black hole structures across wide frequency ranges during large oblique incidence.

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Implication

Numerical modeling demonstrates broadband sound absorption across wide incident angles using a sector-shaped metamaterial, highlighting an effective design strategy for noise mitigation.

Cite This Study

Wu et al. (2026) studied this question.

synapsesocial.com/papers/6a7ec7bab70b84ec8b914623 https://doi.org/10.1063/5.0340870

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Implication

Numerical modeling demonstrates broadband sound absorption across wide incident angles using a sector-shaped metamaterial, highlighting an effective design strategy for noise mitigation.

A sector-shaped acoustic metamaterial for broadband and wide-angle sound absorption

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Discussion

Implication

Cite This Study

A sector-shaped acoustic metamaterial for broadband and wide-angle sound absorption

Key Points

Discussion

Implication

Cite This Study

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