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Updated: Jan 28, 2026

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Panel size significantly impacts underwater acoustic measurements. Using a baffle mounting system improved agreement between experimental data and plane wave theory for transmission loss, especially for smaller panels.

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Area of Science:

  • Underwater acoustics
  • Acoustic measurements
  • Wave propagation

Background:

  • Accurate underwater acoustic measurements are crucial for various applications.
  • Plane wave theory is often used to predict acoustic behavior but may not account for all factors.
  • Parametric array sources offer unique capabilities for acoustic testing.

Purpose of the Study:

  • To investigate the influence of panel size on underwater acoustic transmission and reflection.
  • To compare experimental results with plane wave theory predictions.
  • To evaluate methods for improving measurement accuracy.

Main Methods:

  • Experimental determination of transmission loss (TL) and reflection loss spectra for aluminum panels of varying sizes.
  • Utilizing a truncated parametric array source in the 5-100 kHz frequency range.
  • Investigating an alternative panel mounting system with a reflective baffle.

Main Results:

  • Significant discrepancies between experimental data and plane wave theory were observed for smaller panels.
  • Edge diffraction and mounting fixture interference were identified as sources of error.
  • A baffle mounting system substantially improved agreement between experimental TL and plane wave theory for small panels.

Conclusions:

  • Panel size is a critical factor in underwater acoustic transmission and reflection measurements.
  • Edge effects and mounting interferences necessitate careful experimental design.
  • Baffle mounting offers a viable solution to mitigate edge diffraction effects and enhance measurement accuracy.