Demonstration of Eight-Sensor Sagnac Fiber-Optic Hydrophone Array with Alternative Quadrature Phase Bias and Response Equalization Demodulation Algorithm by Delong Zhao, Ke Wang, Shuolin Yang, Wenjie Xie, Yuzhong Chen, Jie Yang, Zhangqi Song, Zhaohua Sun

Subjects: “…fiber-optic hydrophone…”
Get full text

Questions of construction of jet-drop optical measuring systems: registration of acoustic emission signals and temperature measurement in the cutting zone during turning, drilling... by E. V. Leun

Subjects: Get full text

Design of Deep-Sea Acoustic Vector Sensors for Unmanned Platforms by Qindong Sun, Lianglong Da

Subjects: “…acoustic vector hydrophone…”
Get full text

Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock waves by Abhinav Priyadarshi, Paul Prentice, Dmitry Eskin, Peter D. Lee, Iakovos Tzanakis

“…Acoustic emissions and interfacial wave dynamics were simultaneously monitored in droplets of different liquids (water, isopropyl alcohol and glycerol), using a calibrated fiber-optic hydrophone and high-speed imaging. Spectral analysis of the hydrophone data revealed distinct subharmonic frequency peaks in the acoustic spectrum correlated with the wavelength of capillary waves, which were optically captured during the onset of atomization from the repetitive imploding bubbles. …”
Get full text

Hydroacoustic sensing of seismic events during the Tajogaite volcanic eruption (La Palma, Spain) by Jesús Alcázar-Treviño, Guillermo Lara, Eduardo D. Suarez, Manuel Bou, Itahiza Domínguez, Susannah Buchan, Francisco Domínguez, Eugenio Fraile-Nuez

“…We compare hydrophone recordings with island’s seismic network and earthquake database from the Instituto Geográfico Nacional (IGN). …”
Get full text

The Extraction and Validation of Low-Frequency Wind-Generated Noise Source Levels in the Chukchi Plateau by Zhicheng Li, Yanming Yang, Hongtao Wen, Hongtao Zhou, Hailin Ruan, Yu Zhang

“…Low-frequency ocean noise (50–500 Hz) was recorded by a single omnidirectional hydrophone in the open waters of the Chukchi Plateau from 31 August 2021 to 6 September 2021 (local time). …”
Get full text

Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault Earthquakes by Guilherme W. S. deMelo, Ingo Grevemeyer, Dietrich Lange, Dirk Metz, Heidrun Kopp

“…Here, we show that these T‐waves recorded at regional distances on the Ascension hydrophone array of the International Monitoring System can provide critical information on the earthquake location and rupture behavior. …”
Get full text

Impact of Radial Electrode Coverage on the Performance of Liquid-Deployed PMUTs: A Dynamic and Kinematic Study by Stephen Sammut, Edward Gatt, Ruben Paul Borg

“…This optimisation was achieved using Finite Element Modelling, laser vibrometry, and hydrophone experimental techniques. The results demonstrated that a radial electrode cover between 65 and 70% significantly enhances the kinematic and dynamic characteristics of a PMUT’s diaphragm when subjected to the excitation of a sine wave electrical signal. …”
Get full text

Analysis of Nuclear Explosion Detection Capability of IMS Hydroacoustic Network by Yan Wang, Wei Tang, Zhehan Liu, Jian Li, Xiaoming Wang, Shiya Zou

“…To assess its effectiveness, according to the reciprocity of underwater acoustic field, this study employs the hydrophone position as the central sound source and utilizes the parabolic equation, along with seabed topography and sound velocity profile data, to estimate the transmission loss. …”
Get full text

Investigation on the Effect of Underwater Acoustic Pressure on the Fundamental Mode of Hollow-Core Photonic Bandgap Fibers by Adel Abdallah, Zhang Chaozhu, Zhong Zhi

“…One of the recent areas of research is to enhance the normalized responsivity (NR) to acoustic pressure of the optical fiber hydrophones by replacing the conventional single mode fibers (SMFs) with hollow-core photonic bandgap fibers (HC-PBFs). …”
Get full text

A Vibration Signal-Based Active Noise Control Method for Liquid-Filled Pipelines by Yunhao Wang, Qichao Liu, Wenjing Yu, Guo Cheng

“…Active control methods with intrusive secondary sources generally use dynamic pressure sensors or hydrophones to collect signals, which destroy the structure of the pipe. …”
Get full text

A Novel Efficient Passive Spatial Orientation Detection Method of UMT Enabled by ISB by Zhengqiang Xiong, Tao Sun, Zhengxing Wang, Yuhao Wu, Jie Yin

“…To achieve good invisibility, we design an intelligent submerged buoy (ISB) structure, which consists of six embedded hydrophones and an in situ electronic control unit (IECU). …”
Get full text

MEMS Acoustic Sensors: Charting the Path from Research to Real-World Applications by Qingyi Wang, Yang Zhang, Sizhe Cheng, Xianyang Wang, Shengjun Wu, Xufeng Liu

“…MEMS acoustic sensors have been increasingly widely applied in various fields, including traditional advantage areas such as microphones, stethoscopes, hydrophones, and ultrasound imaging, and cutting-edge fields such as biomedical wearable and implantable devices.…”
Get full text

Is subsurface geophysics as seismic and acoustic investigations a rescue to groundwater flow inversion? by Delay, Frederick, Mari, Jean-Luc, Porel, Gilles, Chabaux, François, Ackerer, Philippe

“…A FWAL can also confirm or invalidate data from VSP recorded via hydrophones.The block of pseudo-porosities is compared to a different representation of the subsurface in the form of hydraulic conductivity distributions (or hydraulic diffusion) obtained by slug tests or by inversion of transient interference testing between wells. …”
Get full text