Abstract | ||
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AbstractPhased Arrays of Transducers (PATs) allow accurate control of ultrasound fields, with applications in haptics, levitation (i.e. displays) and parametric audio. However, algorithms for multi-point levitation or tactile feedback are usually limited to computing solutions in the order of hundreds of sound-fields per second, preventing the use of multiple high-speed points, a feature that can broaden the scope of applications of PATs. We present GS-PAT, a GPU multi-point phase retrieval algorithm, capable of computing 17K solutions per second for up to 32 simultaneous points in a mid-end consumer grade GPU (NVidia GTX 1660). We describe the algorithm and compare it to state of the art multi-point algorithms used for ultrasound haptics and levitation, showing similar quality of the generated sound-fields, and much higher computation rates. We then illustrate how the shift in paradigm enabled by GS-PAT (i.e. real-time control of several high-speed points) opens new applications for PAT technologies, such as in volumetric fully coloured displays, multi-point spatio-temporal tactile feedback, parametric audio and simultaneous combinations of these modalities. |
Year | DOI | Venue |
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2020 | 10.1145/3386569.3392492 | ACM Transactions on Graphics |
Keywords | DocType | Volume |
Multi-point phase optimization, Parametric sound, Ultrasound Levitation, Mid-air haptics, Phased Arrays of Transducers | Journal | 39 |
Issue | ISSN | Citations |
4 | 0730-0301 | 0 |
PageRank | References | Authors |
0.34 | 0 | 4 |
Name | Order | Citations | PageRank |
---|---|---|---|
Diego Martinez Plasencia | 1 | 117 | 11.36 |
Ryuji Hirayama | 2 | 10 | 6.02 |
Roberto A. Montano Murillo | 3 | 14 | 1.89 |
Sriram Subramanian | 4 | 1782 | 119.93 |