Effect of the Diffraction of Sound by the Carrier of Hydroacoustic Equipment on the Results of Measurements

Kosobrodov, R. A.; Nekrasov, V. N.

doi:10.1007/bf03353587

Cited by 10 publications

(2 citation statements)

References 11 publications

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“…The wave tube can be used to ensure that the hyd the plane-wave field in which both the FPVH hydrophone and the standard are placed. To determine the receiving sensitivity and directional response the output signals of the FPVH are compared to those of a standard hydr sensitivity calibration test was conducted by fixing the sound source at the b wave tube and emitting sound waves upward under the excitation of the pow to form a free sound field [27]. The standard hydrophone is positioned upsid lifting table to ensure that its head is vertically oriented, effectively receivin source signal emitted by the signal transducer.…”

Section: Experimental Equipment and Characteristicsmentioning

confidence: 99%

Design and Implementation of a Four-Unit Array Piezoelectric Bionic MEMS Vector Hydrophone

Shi,

Zhang,

Wang

et al. 2024

Micromachines

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High-performance vector hydrophones have been gaining attention for underwater target-monitoring applications. Nevertheless, there exists the mutual constraint between sensitivity and bandwidth of a single hydrophone. To solve this problem, a four-unit array piezoelectric bionic MEMS vector hydrophone (FPVH) was developed in this paper, which has a cross-beam and a bionic fish-lateral-line-nerve-cell-cilia unit array structure. Simulation analysis and optimization in the design of the bionic microstructure have been performed by COMSOL 6.1 software to determine the structure dimensions and the lead zirconate titanate (PZT) thin film distribution. The FPVH was manufactured using MEMS technology and tested in a standing wave bucket. The results indicate that the FPVH has a sensitivity of up to −167.93 dB@1000 Hz (0 dB = 1 V/μPa), which is 12 dB higher than that of the one-unit piezoelectric MEMS vector hydrophone (OPVH). Additionally, the working bandwidth of the FPVH reaches 20 Hz~1200 Hz, exhibiting a good cosine curve with an 8-shape. This work paves a new way for the development of multi-unit piezoelectric vector hydrophones for underwater acoustic detectors.

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Section: Experimental Equipment and Characteristicsmentioning

confidence: 99%

Design and Implementation of a Four-Unit Array Piezoelectric Bionic MEMS Vector Hydrophone

Shi,

Zhang,

Wang

et al. 2024

Micromachines

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show abstract

“…Many scholars have been involved in related studies. Kosobrodov et al [8] studied the acoustic properties near the solid spherical shell in finite space and the influence on vector hydrophone. Barton et al [9] calculated the acoustic pressure distribution near the rigid spheroid with an arbitrary incident acoustic field.…”

Section: Introductionmentioning

confidence: 99%

Properties of the Acoustic Vector Field near the Underwater Planar Cavity Baffle and Its Application

Chen

Zhu

Yang

2022

JMSE

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In order to apply the acoustic vector hydrophone on a ship, the properties of the acoustic vector field near the underwater planar cavity baffle are studied based on the Euler description and Lagrange description. The acoustic vector field is calculated based on the transfer matrices and matched boundary conditions. It is shown that the interference structure appears in the acoustic field. In particular, the particle velocity direction and intensity vector cannot directly reflect the azimuth of the source. The points at which the particle velocity is zero are saddle points and nodal points in the particle velocity vector field. Moreover, the particle motion is generally an ellipse near the planar cavity baffle. Furthermore, this paper defines a parameter that can fully represent the particle motion, and the direction of arrival (DOA) can be estimated using a single acoustic vector hydrophone using this parameter in some cases. At the end, the validity of the theoretical calculation and the method of using the parameter to estimate the DOA are verified experimentally.

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Influences on the Directivity of Acoustic Vector Sensor by Soft Finite Cylinder Baffle

Liang

Zhang

et al. 2011

Communications in Computer and Information Science

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Effect of the Diffraction of Sound by the Carrier of Hydroacoustic Equipment on the Results of Measurements

Cited by 10 publications

References 11 publications

Design and Implementation of a Four-Unit Array Piezoelectric Bionic MEMS Vector Hydrophone

Design and Implementation of a Four-Unit Array Piezoelectric Bionic MEMS Vector Hydrophone

Properties of the Acoustic Vector Field near the Underwater Planar Cavity Baffle and Its Application

Influences on the Directivity of Acoustic Vector Sensor by Soft Finite Cylinder Baffle

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