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Improved continuous wave frequency modulated sonars with aural displays.

J T Boys, J L Mason, R M Hodgson

    Ultrasonics
    |May 1, 1978
    PubMed
    Summary
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    This study presents new methods to improve audio displays from continuous wave frequency modulated (CWFM) sonars by reducing signal disruptions. These techniques enhance sonar performance, particularly for short-range cardiovascular imaging applications.

    Area of Science:

    • Acoustics
    • Biomedical Engineering
    • Signal Processing

    Background:

    • Continuous wave frequency modulated (CWFM) sonars can suffer from signal disruptions.
    • Reset hiatus and wavelength variations affect received signal strength.
    • These variations impact the aural displays generated by CWFM sonars.

    Purpose of the Study:

    • To describe methods for reducing signal discontinuities in CWFM sonar aural displays.
    • To present techniques for mitigating reset hiatus and wavelength-related signal variations.
    • To demonstrate the application of these methods in a novel short-range cardiovascular sonar.

    Main Methods:

    • Development of two techniques to address signal phase and amplitude discontinuities.
    • Implementation and evaluation of these techniques in sonar systems.

    Related Experiment Videos

  • Detailed discussion of a novel short-range sonar utilizing one of the developed techniques.

    • Main Results:

    • Reduced effects of reset hiatus and wavelength variations on sonar aural displays.
    • Improved signal quality and reliability in CWFM sonar systems.
    • Successful demonstration of enhanced performance in a cardiovascular imaging sonar.

    Conclusions:

    • The presented techniques effectively reduce signal discontinuities in CWFM sonar.
    • The novel short-range sonar demonstrates practical application and improved performance.
    • These advancements contribute to more reliable and informative sonar-based diagnostic tools.