Publications associées à Acoustique sous-marine

Scattering from Time-Modulated Transmission-Line Loads: Theory and Experiments in Acoustics

Romain Christophe Rémy Fleury, Matthieu Francis Malléjac

Scattering wave systems that are periodically modulated in time offer many new degrees of freedom to control waves in both the spatial and frequency domains. Such systems, albeit linear, do not conserve frequency and require the adaptation of the usual the ...

2023

Use of an unmanned aerial-aquatic vehicle for acoustic sensing in freshwater ecosystems

Mirko Kovac, Raphael Zufferey

Freshwater ecosystems are endangered, underfunded and understudied, making new methods such as passive acoustic monitoring (PAM) essential for improving the efficiency and effectiveness of data collection. However, many challenges are still to be addressed ...

Hoboken2023

Partial discharge localization in power transformers using acoustic time reversal

Marcos Rubinstein, Mohammad Azadifar, Hamidreza Karami, Florent Quentin Aviolat

The localization of partial discharges (PD) is important to monitor the conditioning of high voltage insulator materials. One of the key components in power grids is the high power transformer. Localization of PDs in these pieces of equipment can increase ...

Elsevier2022

Corona discharge actuator as an active sound absorber under normal and oblique incidence

Hervé Lissek, Stanislav Sergeev, Thomas Humbert

In the majority of active sound absorbing systems, a conventional electrodynamic loudspeaker is used as a controlled source. However, particular situations may require an actuator that is more resistant to harsh environments, adjustable in shape, and light ...

2022

Subharmonic parametric instability in nearly brimful circular cylinders: a weakly nonlinear analysis

François Gallaire, Alessandro Bongarzone, Francesco Viola

In labscale Faraday experiments, meniscus waves respond harmonically to small-amplitude forcing without threshold, hence potentially cloaking the instability onset of parametric waves. Their suppression can be achieved by imposing a contact line pinned at ...

CAMBRIDGE UNIV PRESS2022

Recent Advances in Piezoelectric Materials for Electromechanical Transducer Applications

Dragan Damjanovic

Ferroelectricity has made a huge impact on science and technology since Joseph Valasek (then a Ph.D. student at the University of Minnesota) discovered it in 1920, a little longer than 100 years ago. Whereas Dr. Valasek's original research was motivated by ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Combining active and passive acoustic methods to image hydraulic fracture growth in laboratory experiments

Brice Tanguy Alphonse Lecampion, Seyyedmaalek Momeni, Dong Liu

We combine active and passive acoustic measurements to improve the spatio- temporal imaging of hydraulic fracture growth performed under true triaxial confinement in the laboratory. 64 active piezo-electric transducers (54 P waves, 10 S waves) work in sour ...

IOP2021

A phenomenological extended-reaction boundary model for time-domain wave-based acoustic simulations under sparse reflection conditions using a wave splitting method

Jan Sickmann Hesthaven

In environmental acoustics and in room acoustics, many surfaces exhibit extended-reaction (ER) behavior, i.e., their surface impedance varies with the angle of the incident sound wave. This paper presents a phenomenological method for modeling such angle d ...

ELSEVIER SCI LTD2021

A Study on MoS2 Nanolayer Coated Etched Fiber Bragg Grating Strain Sensor

Suneetha Sebastian

In this paper, we report on the comprehensive study on Molybdenum disulfide (MoS2) nanolayer coated etched Fiber Bragg Grating (eFBG) strain sensor. MoS2 nanolayer is coated using Physical Vapor Deposition (PVD) of Molybdenum (Mo) on eFBGs followed by sulf ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2021

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Acoustique sous-marine

Scattering from Time-Modulated Transmission-Line Loads: Theory and Experiments in Acoustics

Use of an unmanned aerial-aquatic vehicle for acoustic sensing in freshwater ecosystems

Partial discharge localization in power transformers using acoustic time reversal

Corona discharge actuator as an active sound absorber under normal and oblique incidence

Subharmonic parametric instability in nearly brimful circular cylinders: a weakly nonlinear analysis

Recent Advances in Piezoelectric Materials for Electromechanical Transducer Applications

Combining active and passive acoustic methods to image hydraulic fracture growth in laboratory experiments

A phenomenological extended-reaction boundary model for time-domain wave-based acoustic simulations under sparse reflection conditions using a wave splitting method

A Study on MoS2 Nanolayer Coated Etched Fiber Bragg Grating Strain Sensor

Sparse and Parametric Modeling with Applications to Acoustics and Audio

Graph Chatbot

Chattez avec Graph Search

Use of an unmanned aerial-aquatic vehicle for acoustic sensing in freshwater ecosystems

A phenomenological extended-reaction boundary model for time-domain wave-based acoustic simulations under sparse reflection conditions using a wave splitting method

Sparse and Parametric Modeling with Applications to Acoustics and Audio

A Study on MoS2 Nanolayer Coated Etched Fiber Bragg Grating Strain Sensor

Recent Advances in Piezoelectric Materials for Electromechanical Transducer Applications

Partial discharge localization in power transformers using acoustic time reversal

Combining active and passive acoustic methods to image hydraulic fracture growth in laboratory experiments

Scattering from Time-Modulated Transmission-Line Loads: Theory and Experiments in Acoustics

Corona discharge actuator as an active sound absorber under normal and oblique incidence

Subharmonic parametric instability in nearly brimful circular cylinders: a weakly nonlinear analysis