Application of the Residual Period Method in Low-Frequency Hydrophone Sensitivity Calibration

QU Minglong; DUAN Chao; CAI Yue; ZHANG Kai; XIE Jianyu; ZHAO Peng; GUO Shixu

doi:10.12338/j.issn.2096-9015.2023.0279

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QU Minglong, DUAN Chao, CAI Yue, ZHANG Kai, XIE Jianyu, ZHAO Peng, GUO Shixu. Application of the Residual Period Method in Low-Frequency Hydrophone Sensitivity Calibration[J]. Metrology Science and Technology. doi: 10.12338/j.issn.2096-9015.2023.0279

Citation:

QU Minglong, DUAN Chao, CAI Yue, ZHANG Kai, XIE Jianyu, ZHAO Peng, GUO Shixu. Application of the Residual Period Method in Low-Frequency Hydrophone Sensitivity Calibration[J]. Metrology Science and Technology. doi: 10.12338/j.issn.2096-9015.2023.0279

Citation:

QU Minglong, DUAN Chao, CAI Yue, ZHANG Kai, XIE Jianyu, ZHAO Peng, GUO Shixu. Application of the Residual Period Method in Low-Frequency Hydrophone Sensitivity Calibration[J]. Metrology Science and Technology. doi: 10.12338/j.issn.2096-9015.2023.0279

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Application of the Residual Period Method in Low-Frequency Hydrophone Sensitivity Calibration

doi: 10.12338/j.issn.2096-9015.2023.0279

1.
China Jiliang University College of metrology and measurement engineering, Hangzhou 3100018, China
2.
Beijing Beiran Huanneng Technology Development Co., Ltd., Beijing 100011, China

Received Date: 2023-11-16
Accepted Date: 2024-02-22
Rev Recd Date: 2024-07-24

Available Online: 2024-09-25

Abstract

Abstract

This study addresses the challenges in calibrating hydrophone sensitivity at low frequencies, which arise from limitations in water tank dimensions, unavoidable reflections in water pools, and superposition of reflections in the low-frequency range. Building upon the free-field comparison method, we propose a technique that fits the amplitude, frequency, and phase of residual periodic signals to lower the frequency limit for sensitivity calibration. Experimental results demonstrate that this method enables sensitivity calibration in the 2.5-20 kHz frequency range, with errors within 0.6 dB. It effectively eliminates calibration errors caused by reflected sound fields, validating its efficacy in low-frequency calibration. However, the residual period method has some practical limitations. Factors such as environmental noise, attenuation of reflected sound fields, and nonlinear effects can impact the method's accuracy. Despite these challenges, the proposed approach shows promise in expanding the frequency domain for hydrophone calibration, particularly in low-frequency ranges where traditional methods face significant obstacles.
- metrology,
- residual period method,
- sensitivity,
- free-field comparison method,
- frequency domain expansion,
- hydrophone

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References(30)

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