The Discrete Huygens Modeling (DHM) is a numerical method that applies the Huygens physical principle to a discretized medium in order to provide time domain results to wave propagation problems. The method was originally developed for electromagnetism applications, but different works have shown that DHM is also a viable and promising approach for the simulation of acoustic problems. The main ...

• Achieve accurate and computationally efficient inversion for propagation medium parameters and source localization by designing estimation schemes that combine acoustic field and statistical modeling. • Develop methods for passive localization and inversion of environmental parameters that select features of propagation that are essential to model for accurate inversion. • Implement Bayesian ...

The ability to accurately characterize an underwater sound source is an important prerequisite for many applications including detection, classification, monitoring and mitigation. Unfortunately, anechoic underwater recording environments required to make ideal recordings are generally not available. This paper presents a practical approach to source characterization when working in an imperfec...

The estimation of the impulse response (IR) of a propagation channel may be of great interest for a large number of underwater applications: underwater communications, sonar detection and localization, marine mammal monitoring, etc. It quantifies the distortions of the transmitted signal in the underwater channel and enables geoacoustic inversion. The propagating signal is usually subject to ad...

Many potential applications such as ocean sampling network, environment monitoring, undersea exploration, disaster prevention, assisted navigation, and mine reconnaissance can be provided by deploying the Underwater Acoustic Sensor Networks. Because of the peculiarities of acoustic communication in underwater, the MAC protocol which play a role of managing and controlling the channels, must ove...

Continuing efforts from previous years, we work with Bayesian approaches applied to acoustic signals for the extraction of acoustic features using a combination of physics and statistical signal processing. We are focusing on identifying arrival times and amplitudes of distinct frequencies (within a single mode or across different modes). Those provide significant information on properties of t...

Acoustic asymmetrical transmission is a theoretical and engineering challenge because of the reciprocity linear acoustic wave equation. It can be achieved by systems breaking or reciprocal relying solely on spatial symmetry breaking. Metagratings are planar structures Bragg's diffraction to reroute energy toward desired direction eventually able achieve when build from an pattern multiple basic...

Fabrice Silva, Vincent Debut, Philippe Guillemain, Jean Kergomard, Christophe Vergez. Some simulations of the effect of varying excitation parameters on the transients of reed instruments. 21st International Congress on Acoustics (ICA 2013), Jun 2013, Montréal, Canada. Proceedings of Meetings on Acoustics, Proceedings of Meetings on Acoustics, Vol. 19, 035058 (2013), pp.4aMU4, 2013, Internation...

underwater target imaging using acoustic waves is possible by employing the method used in synthetic aperture radars. in recent years, synthetic aperture sonar has been the subject of several researches. wherein imaging of underwater moving target is required, inverse synthetic aperture sonar (isas) idea can be used but specifications and limitations of underwater channel should be considered. ...