Nie, L. orcid.org/0000-0002-5796-907X, Toulemonde, M. orcid.org/0000-0002-3191-8020, Tang, M.-X. orcid.org/0000-0001-7686-425X et al. (2 more authors) (2023) A human ear-inspired ultrasonic transducer (HEUT) for 3D localization of sub-wavelength scatterers. Applied Physics Letters, 123 (8). 082203. ISSN 0003-6951
Abstract
The proposed technology aims to enable 3D localization of scatterers using single element ultrasonic transducers, which are traditionally limited to 1D measurements. This is achieved by designing a bespoke acoustic lens with a spiral-shaped pattern similar to the human outer ear, a shape that has evolved for sound source localization. This lens breaks the surface symmetry of the transducer, allowing ultrasonic waves arriving from different directions to be encoded in a certain way that can later be decoded to extract directional information. By employing the mechanism of spatial-encoding of the received signals and decoding via signal processing, the location of sub-wavelength scatterers can be detected in 3D with a single measurement for sparsely distributed scatterers. The proposed technology is first verified through a simulation study, and then 3D printed acoustic lenses are used to demonstrate the 3D encoding functionality of the Human Ear-inspired Ultrasonic Transducer (HEUT) experimentally. A framework is created to localize scatterers in 3D by processing received signals acquired by a HEUT prototype. With this technology, a single transducer can obtain multi-dimensional information with a single pulse-echo measurement, reducing the number of elements required for performing 3D ultrasound localization. The proposed spatial-encoding and -decoding technology can be applied to other wave-based imaging methods to develop affordable, practical, and compact sensing devices.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 Author(s). Published under an exclusive license by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Nie, L. , Toulemonde, M. , Tang, M.-X. et al. (2 more authors) (2023) A human ear-inspired ultrasonic transducer (HEUT) for 3D localization of sub-wavelength scatterers. Applied Physics Letters, 123 (8). 082203. ISSN 0003-6951 and may be found at https://doi.org/10.1063/5.0152029. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Ultrasound; Auditory system; Ultrasonics; Acoustic signal processing; Sound localization; Acoustic transducers |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Robotics, Autonomous Systems & Sensing (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Sep 2023 14:48 |
Last Modified: | 11 Nov 2024 12:30 |
Status: | Published |
Publisher: | American Institute of Physics |
Identification Number: | 10.1063/5.0152029 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:203391 |