Acoustic Wavefront Shaping Using Ultrahigh Phase Resolution Metamaterial
Sourabh Dogra, Shubhi Bansal, Vikramjeet Singh, Sriram Subramanian, Manish K. Tiwari · Wiley · 2025
A transmissive acoustic metamaterial unit cell with a rotated bilateral symmetrical T-shaped structure provides high phase-delay resolution for sound focusing and steering.
Plain English summary
Why this matters
Key findings
- A transmissive acoustic metamaterial unit cell based on a subwavelength BST structure in a rectangular waveguide is proposed.
- Rotation of the BST structure along the z-axis enables precise phase-delay control with up to π/36 radian resolution at 8000 Hz.
- Experiments, simulations, and theoretical modeling are used to define causes of observed phase delays.
- A 17×17 unit-cell full-scale metamaterial is fabricated via polyjet 3D printing and tested for sound focusing and steering.
- Results are validated through experiments and numerical simulations.
Limitations
The abstract does not specify bandwidth, performance across frequencies beyond 8000 Hz, robustness to fabrication tolerances, scalability beyond the demonstrated 17×17 array, or comparisons to specific prior designs beyond general statements.
Publication
- Publisher
- Wiley
- Publication date
- August 12, 2025
- Research type
- Paper
- License
- http://creativecommons.org/licenses/by/4.0/
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