SoundBender: Dynamic Acoustic Control Behind Obstacles
summary
A hybrid system combines phased arrays of transducers with 3D‑printed acoustic metamaterials to steer ultrasound around obstacles and produce levitation and mid‑air haptics. A discretized 16‑brick, self‑bending beam design plus dynamic PAT phase patterns lets traps tilt and move; transducer size (10.5 mm) exceeds wavelength (8.6 mm), motivating the metamaterial. Recommends 0.75 λ spacing with padding transducers; prototypes show matched simulation and measurement and demonstrate levitation, tactile feedback, and flow control behind blockers.
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chapters (8)
- 0:00Introduction to project
- 1:36Existing approaches
- 3:31Metamaterial exploration
- 6:39Hybrid modulator concept
- 8:35Fabrication and modeling
- 10:31Dynamic control techniques
- 12:24Evaluation and applications
- 14:19Conclusion and Q&A
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