Inverse design of acoustic metamaterial sound barriers for road traffic noise control
Jiansen Li, Mingjing Yue, Yijin Hao · SAGE Publications · 2026
An inverse-design framework links measured road-noise spectra to optimized nested-Helmholtz acoustic metamaterial unit cells, yielding broader bandgap attenuation confirmed by impedance-tube tests and field trials.
Plain English summary
Why this matters
Key findings
- AMIDM links measured noise spectra to optimized acoustic metamaterial unit cells for targeted noise reduction.
- Inverse-designed nested-Helmholtz resonator barrier outperforms conventional uniform arrays by expanding effective bandwidth.
- Broad first bandgap reported at 400.9–970.7 Hz with suppression of acoustic wave propagation (simulation).
- Impedance tube experiments confirm attenuation in the same band and closely match simulated STL response.
- Field tests report maximum sound pressure level reductions of 4.8 dB (first bandgap) and 2.9 dB (second).
Limitations
The abstract does not specify design constraints, robustness to environmental variability, long-term durability, manufacturing tolerances, or how generalizable performance is across different noise conditions beyond the stated 'generalizable approach.'
Publication
- Publisher
- SAGE Publications
- Publication date
- January 18, 2026
- Research type
- Paper
- License
- https://journals.sagepub.com/page/policies/text-and-data-mining-license
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