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  3. Comparative Experimental Investigation On Optimal Parametric Array Types.
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Comparative Experimental Investigation on Optimal Parametric Array Types.

Donghwan Jung1, Jiyoung Song2, Jeasoo Kim2

  • 1Underwater Vehicle Research Center, Korea Maritime and Ocean University, Busan 49112, Korea.

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|August 10, 2021

View abstract on PubMed

Summary
This summary is machine-generated.

This study compares dual-frequency and broadband parametric arrays (PA) for generating low-frequency sound. The broadband PA demonstrated superior performance, making it more suitable for acoustic material characterization.

Keywords:
broadband parametric arraydual-frequency parametric arrayparametric array

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Area of Science:

  • Acoustics
  • Nonlinear acoustics
  • Signal processing

Background:

  • Parametric arrays (PA) generate high-directivity low-frequency sound from high-frequency signals via medium nonlinearity.
  • PAs are valuable for low-frequency acoustic material property measurements in confined spaces, despite limited source levels.
  • Improving the source level of secondary signals in PAs is crucial for enhanced measurements.

Purpose of the Study:

  • To experimentally compare the performance of dual-frequency and broadband parametric arrays (PA).
  • To evaluate the intensity and frequency domain characteristics of secondary signals generated by each PA driving method.
  • To determine the optimal PA driving method for low-frequency acoustic material characterization systems.

Main Methods:

  • Comparative experimental investigation of dual-frequency and broadband parametric array driving methods.
  • Analysis of the intensity of generated secondary signals.
  • Examination of the frequency domain characteristics of the secondary signals.

    • Main Results:

    • Both dual-frequency and broadband parametric arrays were investigated.
    • The intensity and frequency characteristics of the secondary signals were compared.
    • The broadband parametric array showed greater suitability for the intended application.

    Conclusions:

    • The broadband parametric array is more suitable for low-frequency acoustic material characterization systems.
    • This finding is based on the superior intensity and frequency domain characteristics of the secondary signals generated.
    • The study provides valuable insights for optimizing sound sources in acoustic material testing.