Reconfigurable source illusion device for airborne sound using an enclosed adjustable piezoelectric metasurface

doi:10.1088/1674-1056/ac9fc0

Abstract Source illusion is an important issue in acoustic fields that has significant applications in various practical scenarios. Recent progress in acoustic metasurfaces has broken the limitation of manipulating large-scale waves at subwavelength scales and enables a better illusion capability, while there is still a problem that most previous studies are hampered by a lack of tuning capability. Here we propose a reconfigurable source illusion device capable of providing azimuthally-dependent phase delay in real-time via changing the static voltage distribution. The resulting device is implemented by employing an adjustable piezoelectric metasurface with a subwavelength thickness that can achieve a full 2π -phase shift while maintaining efficient transmittance. The effectiveness of our mechanism is demonstrated via two distinctive source illusion phenomena of shifting and transforming a simple point source without changing the device geometry. We anticipate that our methodology, which does not require a large device size or a complicated phased array, will open up new avenues for the miniaturization and integration of source illusion devices and may promote their on-chip applications in a variety of fields, such as acoustic camouflage and manipulation precision.

Keywords: acoustic metasurface source illusion piezoelectric materials adjustable control

Received: 14 September 2022
Revised: 01 November 2022
Accepted manuscript online: 03 November 2022

PACS:	43.20.+g	(General linear acoustics)
	43.40.+s	(Structural acoustics and vibration)
	43.90.+v	(Other topics in acoustics)
	52.35.Dm	(Sound waves)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12174240, 11674206, and 11874253) and the Natural Science Basic Research Plan in the Shaanxi Province of China (Grant No. 2023-JC-QN-0049).

Corresponding Authors: Shu-Yu Lin
E-mail: sylin@snnu.edu.cn

Cite this article:

Yi-Fan Tang(唐一璠) and Shu-Yu Lin(林书玉) Reconfigurable source illusion device for airborne sound using an enclosed adjustable piezoelectric metasurface 2023 Chin. Phys. B 32 034306

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Reconfigurable source illusion device for airborne sound using an enclosed adjustable piezoelectric metasurface

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