Measurement of the sensitivity phase-frequency characteristics of hydrophones by the reciprocity method

Isaev, А. Е.; Matveev, А. N.; Polikarpov, A. M.; Shcherblyuk, N. G.

doi:10.1007/s11018-013-0269-z

Cited by 10 publications

(2 citation statements)

References 1 publication

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“…The equivalent receiving position of the hydrophone is called the acoustic center [20]. For better bearing performance, the acoustic response of each hydrophone is expected to be consistent, but unfortunately, this is not realistic [21]. Like microphones, whose acoustic centers are not always in the exact centers of the enclosing rubber ball [22], hydrophones can face the same problem.…”

Section: Introductionmentioning

confidence: 99%

Fast Calibration of Superdirective Ultra-Short Baseline Array

Hu,

Wang,

Yang

et al. 2023

JMSE

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Array calibration can effectively ensure the positioning accuracy of the ultra-short baseline (USBL) system. Traditional USBL array calibration methods focus on measuring the geometric position of the array elements. However, directional phase differences on the receive path are often ignored in the current calibration process, which can also cause array mismatch, especially when using the superdirective beamforming (SDB) technique. To further improve the calibration accuracy and convenience of the USBL using the SDB technique, a fast calibration method is proposed in this paper. In the new method, the hydrophone geometry error and the receiver path phase error are jointly considered. Then, two calibration models with different complexity are presented, and the conventional beamforming (CBF) beam output is deconvoluted with the calibrated beam pattern. The results of anechoic tank experiments show that the bearing root mean square error (RMSE) can be reduced from 1.663° to 0.081°, and the calibration time can be reduced from hours to tens of minutes.

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Section: Introductionmentioning

confidence: 99%

Fast Calibration of Superdirective Ultra-Short Baseline Array

Hu,

Wang,

Yang

et al. 2023

JMSE

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“…This method, which is just as accurate as the tone-pulse method, has made it possible to extend the frequency range for calibrating hydrophones over the fi eld in a tank with a minimal size of 6 m by 11 third octaves downward from a frequency of 3 kHz [4] and to evaluate the sensitivity of hydrophones with respect to the scalar (pressure) and vector (acoustic pressure gradient) magnitudes of the forward wave fi eld [5]. LFM signals have been used for comprehensive calibration of hydrophones by the reciprocity method, the amplitude and phase-frequency sensitivity characteristics have been obtained with the nonuniqueness of the phase angles eliminated, and the displacement of the acoustic center has been studied [6].…”

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confidence: 99%

Use of Signals with Power Distributed Over Frequency for Laboratory Calibration of Hydroacoustic Receivers

Isaev

Chernikov

2015

Meas Tech

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A. E. Isaev and I. V. Chernikov UDC 534.6 It is shown that tone-pulsed, linearly frequency modulated, and noise signals supplement each other harmonically, so that it is important to use them in all levels of a verifi cation scheme. Data from measurement experiments confi rm the feasibility of this calibration procedure for acoustic noise emission by the sliding complex weighted average technique.

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Equivalent Size and Acoustic Center of Measuring Hydrophone

Isaev¹,

Khatamtaev²

2023

Meas Tech

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Measurement of the sensitivity phase-frequency characteristics of hydrophones by the reciprocity method

Cited by 10 publications

References 1 publication

Fast Calibration of Superdirective Ultra-Short Baseline Array

Fast Calibration of Superdirective Ultra-Short Baseline Array

Use of Signals with Power Distributed Over Frequency for Laboratory Calibration of Hydroacoustic Receivers

Equivalent Size and Acoustic Center of Measuring Hydrophone

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