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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
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Compensating for source directivity in immersive wave experimentation.

Xun Li1, Johan Robertsson1, Andrew Curtis2

  • 1Institute of Geophysics, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland.

The Journal of the Acoustical Society of America
|December 5, 2019
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Summary
This summary is machine-generated.

This study introduces a method to correct imperfect acoustic sources for immersive wave control experiments. The technique ensures accurate wavefield control by compensating for non-monopolar radiation patterns, enhancing experimental fidelity.

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Area of Science:

  • Acoustics
  • Wave Physics
  • Experimental Simulation

Background:

  • Active acoustic boundaries enable wavefield control in experimental setups.
  • Immersive wave control experiments require seamless wave propagation between physical and virtual domains.
  • Physical sources often exhibit non-monopolar radiation patterns, deviating from theoretical requirements.

Purpose of the Study:

  • To propose and validate a method for compensating non-monopolar radiation patterns of active acoustic sources.
  • To enable accurate immersive wave control experiments by correcting source imperfections.
  • To ensure desired wavefield control by mitigating deviations caused by real-world source characteristics.

Main Methods:

  • A pre-computation procedure modifies extrapolation Green's functions within the Kirchhoff-Helmholtz integral.
  • The method compensates for non-monopolar radiation patterns of physical sources.
  • Two-dimensional finite-difference simulations are used to validate the approach.

Main Results:

  • The proposed processing method effectively suppresses undesired effects from non-monopolar sources.
  • Simulations demonstrate the successful compensation of source radiation patterns.
  • The technique allows for more accurate immersive wave control experiments.

Conclusions:

  • The developed method is crucial for achieving precise wavefield control in immersive experiments.
  • Accurate compensation of source characteristics is vital for the success of virtual-acoustic simulations.
  • This approach enhances the fidelity of experiments integrating physical and numerical domains.