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Jhon F Pazos-Ospina1, Joao L Ealo1, Ediguer E Franco2

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This study explores the electronic steering of acoustic vortex (AV) beams. Researchers analyzed how delay laws affect steered AV beams and identified acoustic grating vortices, paving the way for new applications.

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Area of Science:

  • Acoustics
  • Wave physics
  • Array signal processing

Background:

  • Acoustic vortex (AV) beams are of significant interest for applications like particle manipulation.
  • Phased array systems enable flexible AV beam generation, including focusing and shape modification.
  • The electronic steering capability of AV beams has been underexplored.

Purpose of the Study:

  • To investigate the steering capability of acoustic vortex beams.
  • To analyze the impact of applied delay laws on the structure of steered AV beams.
  • To examine the phenomenon of acoustic grating vortices and the influence of element directivity.

Main Methods:

  • Numerical simulations of AV beam steering using a 32-element transducer array on a triangular lattice at 40 kHz.
  • Analysis of the effect of different delay laws on beam steering angles.
  • Experimental validation of numerical predictions.

Main Results:

  • Demonstration of electronic steering of AV beams at various angles.
  • Identification and characterization of acoustic grating vortices.
  • Quantification of the influence of individual element directivity on the resultant beam structure.

Conclusions:

  • Electronically steered acoustic vortices offer potential for diverse applications.
  • Acoustic grating vortices present unique characteristics for further investigation.
  • The findings provide a foundation for utilizing steered AV beams in advanced technologies.