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This study introduces an efficient eigenray method using auxiliary parameters for acoustic ray tracing. The method accurately identifies propagation paths and aids in analyzing infrasonic signals from rocket launches.

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Area of Science:

  • Acoustics
  • Geophysics
  • Atmospheric Science

Background:

  • Acoustic ray tracing is crucial for understanding sound propagation.
  • Identifying specific propagation paths and phase shifts can be challenging.
  • Existing methods may struggle with non-planar propagation scenarios.

Purpose of the Study:

  • To extend acoustic ray tracing by incorporating auxiliary parameters.
  • To develop an efficient method for identifying specific propagation paths (eigenrays).
  • To apply this method to analyze infrasonic signals from rocket launches.

Main Methods:

  • Extended acoustic ray tracing relations with auxiliary parameters.
  • Computed geometric spreading factors and identified caustic surfaces.
  • Developed and utilized an eigenray identification method.
  • Applied the eigenray method to analyze infrasonic rocket launch data.

Main Results:

  • Auxiliary parameters facilitate identification of geometric spreading and phase shifts.
  • The novel eigenray method is efficient for non-planar propagation.
  • Demonstrated promising results in tracking atmospheric aeroacoustic sources.
  • Successfully applied to analyze rocket motor performance during dynamic tests.

Conclusions:

  • The developed eigenray method enhances acoustic ray tracing accuracy and efficiency.
  • This technique offers valuable applications in atmospheric acoustics and source tracking.
  • The method shows potential for detailed analysis of aeroacoustic phenomena and vehicle performance.