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GS-PAT: High-Speed Multi-Point Sound-Fields for Phased Arrays of Transducers

Martinez Plasencia, D; Hirayama, R; Montano Murillo, R; Subramanian, S; (2020) GS-PAT: High-Speed Multi-Point Sound-Fields for Phased Arrays of Transducers. ACM Transactions on Graphics , 39 (4) 138.1-138.12. 10.1145/3386569.3392492. Green open access

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SupplementaryMaterial_GS-PAT_v2.pdf - Accepted version

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Hirayama_GS-PAT- High-Speed Multi-Point Sound-Fields for Phased Arrays of Transducers_AAM.pdf - Accepted version

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Abstract

Phased 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.

Type: Article
Title: GS-PAT: High-Speed Multi-Point Sound-Fields for Phased Arrays of Transducers
Open access status: An open access version is available from UCL Discovery
DOI: 10.1145/3386569.3392492
Publisher version: https://doi.org/10.1145/3386569.3392492
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: Multi-point phase optimization, Parametric Sound, Mid-air haptics, human-computer interaction, Acoustic Levitation
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
URI: https://discovery.ucl.ac.uk/id/eprint/10106840
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