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Related Experiment Videos

Harmonic ultrasound fields through layered liquid media.

Yadong Li1, Quan Chen, James Zagzebski

  • 1Department of Medical Physics, University of Wisconsin, Madison, WI, USA.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|April 2, 2004
PubMed
Summary

This study investigated harmonic field generation in layered liquid media using experimental and theoretical methods. Accurate predictions of acoustic beam profiles were achieved, validating the KZK equation for complex media.

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Area of Science:

  • Acoustics
  • Nonlinear Acoustics
  • Wave Propagation

Background:

  • Harmonic generation is crucial for nonlinear acoustics.
  • Understanding wave propagation in layered media is essential for various applications.
  • Accurate modeling of acoustic fields is challenging.

Purpose of the Study:

  • To experimentally and theoretically investigate harmonic field generation in layered liquid media.
  • To validate the KZK equation for predicting acoustic beam profiles in uniform and layered media.
  • To assess the impact of nonlinear propagation, diffraction, attenuation, and reflection on harmonic fields.

Main Methods:

  • Focused and unfocused transducer measurements using a calibrated hydrophone.
  • Utilizing a cylindrical phantom with vegetable oil to create layered media.

Related Experiment Videos

  • Frequency domain numerical solution of the KZK equation.

    • Main Results:

    • Experimental measurements of lateral and axial beam profiles for fundamental to 4th harmonic components.
    • High agreement (within 5%) between experimental data and KZK predictions for uniform and layered paths.
    • Excellent agreement for axial beam profiles using an unfocused receiver, accounting for phase variations.

    Conclusions:

    • The KZK equation accurately predicts harmonic field generation in layered liquid media.
    • Experimental and theoretical findings confirm the model's validity for nonlinear acoustic propagation.
    • The study provides a robust method for analyzing acoustic fields in complex media.