Thin Acoustic-Composite Structures With Metamaterial Inclusions for Enhanced Low-Frequency Sound Absorption
Michał A. Niedzielczyk, Tomasz G. Zieliński · ASME International · 2026
Thin porous acoustic composites with tunable labyrinthine metamaterial inclusions achieve enhanced low-frequency absorption via multiresonant behavior confirmed by acoustic tests.
Plain English summary
Why this matters
Key findings
- Labyrinthine subwavelength metamaterial inclusions improve low-frequency sound absorption by introducing tuned multiresonant behavior.
- Resonance frequencies can be tuned to match known noise conditions or to compensate for weak performance of the porous matrix.
- Composite design can use different thicknesses for the porous material and inclusions, enabling a porous layer with an air gap underneath.
- An air gap can reduce added panel thickness by integrating lower parts of the inclusions into the supporting wall.
- Acoustic tests on manufactured samples confirm the predicted multiresonant behavior and overall sound absorption.
Limitations
The abstract does not specify quantitative performance metrics, bandwidth, robustness to manufacturing tolerances, long-term stability, or scalability beyond the two example composites and the stated test setup constraints.
Publication
- Publisher
- ASME International
- Publication date
- February 12, 2026
- Research type
- Paper
- License
- https://www.asme.org/publications-submissions/publishing-information/legal-policies
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