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On acoustic sensor sensitivity.

J R Vig1

  • 1US Army Electron. Technol. and Devices Lab., Fort Monmouth, NJ.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1991
PubMed
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High-frequency acoustic sensors are not always superior. This study shows that good low-frequency acoustic sensors offer better reproducibility and resolution capability than high-frequency ones.

Area of Science:

  • Acoustic sensor technology
  • Metrology
  • Signal processing

Background:

  • Acoustic sensor sensitivity is often expressed as frequency change per unit of measurand.
  • This metric can lead to the misconception that higher-frequency sensors are inherently better.

Purpose of the Study:

  • To challenge the notion that higher-frequency acoustic sensors are superior.
  • To compare low-frequency and high-frequency acoustic sensors based on key performance metrics.

Main Methods:

  • Comparative analysis of acoustic sensor performance.
  • Evaluation based on reproducibility and resolution capability.
  • Theoretical assessment of sensor characteristics.

Main Results:

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  • Higher-frequency sensors are not universally superior to lower-frequency ones.
  • Good low-frequency acoustic sensors demonstrate superior performance in terms of reproducibility.
  • Good low-frequency acoustic sensors exhibit better resolution capability compared to high-frequency sensors.

    • Conclusions:

    • The choice of acoustic sensor should not solely depend on frequency.
    • Reproducibility and resolution capability are critical factors in sensor selection.
    • Low-frequency acoustic sensors can outperform high-frequency sensors when these factors are considered.