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Experimental Determination of the Acoustic Center of a Measuring Hydrophone

  • ACOUSTIC MEASUREMENTS
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Measurement Techniques Aims and scope

Methods for increasing the accuracy of hydrophone phase calibration are considered. It is shown that when calibrating a hydrophone, the reference center, for example, the geometric center of the contour of the active element of the hydrophone, can be displaced relative to the acoustic center of the active element due to the uneven thickness of the waterproofing coating of the element. A method is proposed for determining the position of the acoustic center of a hydrophone relative to a selected reference center. The scheme of the experiment to determine the position (displacement) of the acoustic center of a hydrophone relative to the geometric center of the contour of the active element is described. The results of experiments for different types of hydrophones are presented and the sources of measurement uncertainty are analyzed. It is shown that taking into account the displacement of the acoustic center makes it possible to improve the accuracy of the phase calibration of hydrophones. The proposed method can be used in the field of hydroacoustic measurements of the sensitivity of sound pressure receivers.

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Notes

  1. GOST R IEC 61094-3-2001. GSI. Measuring microphones. Primary free-field calibration method for laboratory reference microphones by the reciprocity method.

  2. IEC 60565-1-2020. Underwater acoustics. Hydrophones. Hydrophone calibration. Part 1. Procedures for calibrating hydrophones in a free field.

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Authors and Affiliations

  1. All-Russian Research Institute of Physical, Technical and Radio Engineering Measurements, Mendeleevo, Moscow region, Russia

    B. I. Khatamtaev & N. G. Shcherblyuk

Authors
  1. B. I. Khatamtaev
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  2. N. G. Shcherblyuk
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Correspondence to B. I. Khatamtaev.

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Translated from Izmeritel'naya Tekhnika, No. 10, pp. 53–57, October, 2022.

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Khatamtaev, B.I., Shcherblyuk, N.G. Experimental Determination of the Acoustic Center of a Measuring Hydrophone. Meas Tech 65, 763–768 (2023). https://doi.org/10.1007/s11018-023-02149-1

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  • DOI: https://doi.org/10.1007/s11018-023-02149-1

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