2023_programme: The development of a traceability chain for hydrophones going from primary calibrations to in-situ calibrations down to 0.5 Hz

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  • Session: 18. Underwater acoustic calibration and standards
    Organiser(s): Stephen Robinson, Markus Linné and Victor Évora
  • Lecture: The development of a traceability chain for hydrophones going from primary calibrations to in-situ calibrations down to 0.5 Hz [invited]
    Paper ID: 2024
    Author(s): Ford Benjamin, Robinson Stephen, Malcher Freya, Barham Richard, Harris Peter
    Presenter: Ford Benjamin
    Abstract: Low frequency acoustic energy in both air and in the ocean, or seismic activity in the ground and seabed, is generated by major natural events such as earthquakes, tsunamis, and volcanic activity. These events can be measured and triangulated by monitoring systems that detect the noise and vibration they generate. These technologies are also used to check compliance with the Comprehensive Nuclear-Test-Ban Treaty, using a global network of sound and vibration sensors together with radio-nuclear sensing, forming the International Monitoring System. However, the majority of the frequencies used for this kind of sound and vibration monitoring are not covered by current measurement standards, limiting the reliability of data obtained. Monitoring stations are also often located in extreme environments posing additional challenges for assuring the accuracy of the sensors.
  • Corresponding author: Mr Benjamin Ford
    Affiliation: NPL
    Country: United Kingdom
    e-mail:

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