ISTerre - Institut des Sciences de la Terre

Codes available for downloading

Ludovic MOREAU — 2017-07-04T15:18:59Z

ncf_denoising.m (Matlab) or fn_SVD_Wiener.py (Python) is a script for denoising a set of ambient noise correlations with an SVD-based Wiener filter. Figure 1 shows the effect of the filter on a set of noise correlation functions.

Effect of the SVD-based Wiener filter on a set of noise correlation functions. Only the causal part is shown. Left : raw correlation functions and right : denoised correlation functions.

More details concerning this function at https://doi.org/10.1093/gji/ggx306

3D_GW_Scattering is a package of scripts for calculating analytically the scattered elastic field in a plate, when a fundamental Lamb mode is incident with a planar wavefront on a (prismatic) defect with arbitrary contour. Figure 2 shows a screenshot of the package : main script with input parameters, defect geometry and scattered field for the S0, A0 and SH0 Lamb wave modes when the A0 mode is incident from the right of the defect.

Research topics

Ludovic MOREAU — 2015-10-26T16:11:59Z

My research concerns the study of acoustic and elastic waves in complex media, at scales ranging from the mm (ultrasonic waves) to the km (seismic waves). In particular, I am interested in the development of methods for high-sensitivity measurements, and high-resolution imaging, using arrays of sensors.

Ultrasonic or seismic waves, Physics are the same, thus these methods can be transferred from one scale to another. However, investigations are generally more convenient with ultrasounds, mostly because active sources can be used easily, and because the objects to study are simpler, in terms of geometry and elastic (acoustic) properties.

1 - Imaging complex media with ultrasound
At the ultrasound scale, my research is focused mainly on wave propagation in waveguides and in multiple scattering media. The main fields of application are non-destructive evaluation (NDE) and structural health monitoring (SHM). The multiplicity of sources and receivers (for example an ultrasonic phased array), allows many new perspectives in the measurement and processing of wave propagation. For example, principal component analysis can be combined with antenna processing methods for significant improvements in the sensitivity and signal-to-noise of the measurements.

Imaging of the propagation medium can be achieved in many ways, from classical delay-and-sum beamforming to advanced model-based algorithms. On the one hand, the former approach is easy to implement and computationally efficient, but it suffers from an inherent lack of accuracy due to ambiguous or badly interpreted travel times between the different waves. This results in unwanted artefacts in the image that may lead to a wrong interpretation of the medium structure. On the other hand, despite heavier computations the latter approach does not suffer from such ambiguities and allow super-resolution images to be achieved. I focus mainly of model-based methods such as the Full Waveform Inversion or Bayesian approaches. the benefit of model-based Bayesian imaging is presented in figure 1 for diffuse waves and in figure 2 for guided waves.

Figure 1 - a) A 15 cm large x 15 cm long x 30 cm high block of concrete with 9 sensors and a drilled hole. b) A measured diffuse waveform with the theoretical envelope. Application of the LOCADIFF imaging method with c) Bayesian inversion and d) linear inversion. In collaboration with Eric Larose

figure 2 - 3D profile of a corrosion patch in a 5mm steel plate. a) Laser scan of the true profile and b) Super-resolution Bayesian reconstruction of profile after inspection with the S0 Lamb wave mode at 150 kHz (wavelenght = 35 mm)

2 - Imaging with ambient seismic noise

At the seismic scale, the use of active sources is difficult and quite restrictive. However, this difficulty can be overcome be replacing the sources with receivers that play the role of virtual sources, via ambient noise correlation techniques (M. Campillo and A. Paul, Science, 2003). Moreover, with current technology it is possible to deploy thousands of seismometers on a given region, which was impossible only 10 years ago due to very high costs. The combination of these two factors allows the above-mentioned investigation methods to be applied at the seismic scale as well. For example, figure 3 shows the velocity of the surface wave on the San Jacinto Fault, measured with a dense array of geophones.

Figure 3 - a) An array of 1108 sensors deployed on the San Jacinto Fault around the Clark branch, South California (from Ben Zion et & al. GJI 2015) and b) Surface wave velocity profile obtained after post-processing the ambient noise data

3 - Seismic guided waves

Seismic waves are like any elastic wave in the sense that they are sensitive to the elastic properties (velocity, density) of the propagation medium. In the Earth's crust, at scales varying from a few meters to a few kilometres, these waves may be trapped in thin layers of the structure. Typically this phenomenon occurs as soon as the thickness of the layers becomes of the order of the wavelength. In that case these thin layers behave like waveguides. In addition to being sensitive to the elastic properties of the medium, guided waves are also sensitive to the geometry of the waveguide. Potentially, guided waves can therefore be used to characterize thin geophysical and geotechnical structures, such as Fault zones, sea ice, glaciers urban soils etc.

However, contrary to the mm scale, at the km scale measuring guided waves poses a practical difficulty, because spatial sampling is required. A decade ago this difficulty made guided waves almost impossible to detect, because the arrangement of seismic stations was essentially limited to sparse configurations for the measurement of surface or body waves only. However, the new generations of seismometers allow deployments of large and dense arrays that are well adapted to measure seismic guided waves.

My main long-term research project is to develop innovative strategies that allow the measurement of guided waves at the Earth scale; and to solve the inverse problem in order to characterize the mechanical and geometrical properties of geophysical waveguides. These strategies will first be developed on experimental data, obtained via laboratory-scale waveguides, and then applied to actual seismic data.

a) The 247 stations of the array, including the main central array, and the four linear arrays to the north, east, south and west. Arrows indicate the positions of ground penetrating radar profiles. b) Aerial view of the main array, with station numbering and a photo of one geophone. The two crosses indicate stations that were installed but failed to record: 125-542 and 113- 509. Station 133-517 was originally a 1C station, but was replaced by a spare 3C station due to technical problems. Red circles are for 1C stations and blue circles for 3C stations. The large arrowheads indicate the positions of ice thickness measurements.

During March 2019, I conducted a seismic experiment on sea ice in Svalbard (Norway). An array of geophones was deployed on sea ice and left to record the seismic noise for four weeks. The goal was to demonstrate that sea ice thickness and elastic properties can be monitored with seismic noise. Figure 4 shows the coordinates of the deployment in Arctic, and an aerial view of the main array.

An example of icequake recording and its propagation through the array is shown in figure 5:

Top: Waveform of an icequake recorded at the center of the main array. Bottom: representation of the vertical displacement component through the main array at the times marked with a red cross in the signal. Higher frequencies arrive before the lower frequencies. This dispersion is typical of the quasi-Scholte mode, a mode propagating at the interface of the sea ice layer and water.

To learn more about this expedition and the results, please visit the Icewaveguide project webpage

Curriculum Vitae

Ludovic MOREAU — 2015-10-19T20:25:21Z

APPOINTMENTS

2013 - present - Associate professor - University Grenoble Alpes, Grenoble, France
2012 - 2013 - Research engineer at CEA - DISC, Saclay, France
2011 - 2012 - Research assistant in biomedical Acoustics - Laboratoire d'Imagerie Paramétrique, Paris, France
2008 - 2011 - Research assistant in acoustic imaging - University of Bristol, United Kingdom
2007 - 2008 - Research and teaching associate - Institute of Mechanics, Bordeaux, France
2004 - 2007 - PhD student and teaching associate - Institute of Mechanics, Bordeaux, France

EDUCATION

2007 - Habilitation à diriger les recherches (HDR), Université Grenoble Alpes, France
2007 - PhD of the Université de Bordeaux, France, speciality Physical Acoustics
2004 - Masters degree of the Université de Poitiers, France, speciality Aeroacoustics
2002 - Licence degree of the Université de Poitiers, France, speciality Mechanics

HONORS

2013 - 2018 - CNRS Chaire d'Excellence Fellowship

RESEARCH ACTIVITIES
Ludovic Moreau is a researcher in the field of wave physics, with a strong background in ultrasonics and geophysics.

He conducted his PhD at the University of Bordeaux from 2004 to 2007, under the supervision of Michel Castaings. He developed a combined numerical-analytical hybrid method for efficient modeling of the interaction between ultrasonic guided waves and heterogeneities in composite materials. Ten years later, this approach has become a useful tool in the filed of Non-destructive Testing (NDT) and is implemented, for example, in CEA's CIVA Software (http://www-civa.cea.fr/en/).

After his PhD, Ludovic Moreau was appointed for a post-doc position at the University of Bristol (United Kingdom) in the Ultrasonic and Non-destructive Testing group. There, he worked from 2008 to 2011 with Paul Wilcox and Bruce Drinkwater (team leader) on advanced imaging algorithms using ultrasonic phased arrays.

From 2011 to 2012, he was appointed for another post-doc position with Pascal Laugier in the field of medical Acoustics in the Laboratoire d'Imagerie Biomédicale at University Paris 6 (France). The post-doc concerned the propagation of ultrasonic guided waves in the human radius to evaluate the mechanical properties of cortical bone. This work was conducted in the context of a startup creation, and a patent was deposited.

From 2012 to 2013, he was appointed a research engineer at CEA-LIST (Saclay, France), where he supervised several NDT-related industrial projects.

In September 2013, Ludovic Moreau was appointed a full-time associate professor in the Wave and Structures group, at the Institut des Sciences de la Terre in Grenoble (France). His current research activities concern the propagation of acoustic and elastic waves in complex media, at scales ranging from the mm (ultrasonic waves) to the km (seismic waves). In particular, he works on the development of methods based on dense arrays for high-sensitivity measurements (direct problem), and high-resolution imaging (inverse problem).

Since 2018, Ludovic Moreau has focused more specifically on sea ice. In order to address the challenges of global warming, he is developing methods to extract rheological parameters from the pack ice that will feed the new generation of models to predict its dynamic response to geophysical forcing. He started with ANR project Icewaveguide project (JCJC, 2018-2023), during which he developed passive methods for monitoring its thickness and rheological properties. He is now continuing with ANR project Multiscale Sea Ice Monitoring project (PRC, 2024-2028), to study the fracturing of the ice pack ice by waves in the marginal ice zone. This research is being carried out with national (ESPCI, Paris) and international collaborations : Helsinki Institute of Seismology, (Finland), Takuvik and Institut des Sciences de la Mer de Rimouski (Canada).

GRANTED PATENTS
2013 - Procédé et dispositif ultrasonores pour représenter la propagation d'ondes ultrasonores dans un guide d'épaisseur linéairement variable (Process and methods for representing the propagation of ultrasonic waves in a waveguide with linearly varying thickness), french patent #1357204

Publications

Ludovic MOREAU — 2015-10-19T20:24:34Z

Peer-reviewed journal articles

34. S. Kuchly, B. Auvity, N. Mokus, M. Bureau, P. Nicot, A. Fourgeaud, V. Dansereau, A. Eddi, S. Perrard, D. Dumont, and L. Moreau, An integrated multi-instrument methodology for studying marginal ice zone dynamics and wave-ice interactions, The Cryosphere (2025), https://doi.org/10.5194/egusphere-2025-3304

33. J. Starke, I. Wienk, R. Rousseau, N. Bontemps, L. Moreau and E. Larose, The physics of seismic noise : A revolution in Earth imaging and monitoring, Europhysics Letters (2025), https://doi.org/10.1209/0295-5075/adcbd1

32. A. Charléty, M. Le Breton, M. Magnier et al., “Locating RFID Tags Under Snow and Vegetation,” in IEEE International Conference on RFID Technology and Applications (2025), Best paper award, p. 1-5. doi : https://doi.org/10.1109/RFID-TA63091.2025.11265841

31. L. Moreau, Seydoux, L., Weiss, J., and Campillo, M. : Analysis of micro-seismicity in sea ice with deep learning and Bayesian inference : application to high-resolution thickness monitoring, The Cryosphere, https://doi.org/10.5194/tc-2022-212, 2023.

30. D. Nziengui-Bâ, , Coutant, O., Moreau, L., and Boué, P. : Measuring the thickness and Young's modulus of the ice pack with DAS, a test case on a frozen mountain lake, Geophysical Journal International, 233, 1166–1177, https://doi.org/10.1093/gji/ggac504, 2022.

29. A. Serripierri, L. Moreau, P. Boue, J. Weiss, and P. Roux, Recovering and monitoring the thickness, density, and elastic properties of sea ice from seismic noise recorded in Svalbard, The Cryosphere (2022), 16, 2527–2543, https://doi.org/10.5194/tc-16-2527-2022.

28. B. Bergfeld, A. van Herwijnen, G. Bobillier, E. Larose, L. Moreau, B. Trottet, J. Gaume, J. Cathomen, J. Dual and J. Schweizer : Crack propagation speeds in weak snowpack layers, J. Glacio (2022), https://doi.org/10.1017/jog.2021.118

27. Q. Xue, E. Larose, L. Moreau, R. Thery, O. Abraham, and J.-M. Henault,
Ultrasonic monitoring of stress and cracks of the 1/3 scale mock-up of nuclear reactor concrete containment structure, Struct. Health Monit. (2021), https://doi.org/10.1177/14759217211034729

26. C. Gradon, P. Roux, L. Moreau, A. Lecointre, Y. Ben Zion, Characterization with dense array data of seismic sources in the shallow part of the San Jacinto Fault Zone, Geophys. J. Int. (2021), ggaa411, https://doi.org/10.1093/gji/ggaa411

25. L. Moreau, J. Weiss and D. Marsan, Accurate estimations of sea‐ice thickness and elastic properties from seismic noise recorded with a minimal number of geophones : from thin landfast ice to thick pack ice. Journal of Geophysical Research : Oceans (2020), 125, e2020JC016492. https://doi.org/10.1029/2020JC016492

24. L. Moreau P. Boué, A. Serripierri, J. Weiss, D. Hollis, I. Pondaven, B. Vial, S. Garambois, E. Larose, A. Helmstetter, L. Stehly, G. Hillers and O. Gilbert, Sea ice thickness and elastic properties from the analysis of multimodal guided wave propagation measured with a passive seismic array, J. Geophys. Res. Oceans (2020), 125, e2019JC015709. https://doi.org/10.1029/2019JC015709

23. C. Lachaud, D.Marsan M. Montagnat, J. Weiss, L. Moreau and F. Gimbert, Micro-seismic monitoring of a floating ice plate to characterize its deformation, in J. Geophys. Res : Solid Earth (2019), 124, 10444– 10467. https://doi.org/10.1029/2019JB018339

22. G. Hillers, M. Campillo, F. Brenguier, L. Moreau, D.C. Agnew, and Y. Ben-Zion, Seismic Velocity Change Patterns Along the San Jacinto Fault Zone Following the 2010M7.2 El Mayor-Cucapah and M5.4 Collins Valley Earthquakes, J. Geophys. Res : Solid Earth (2019). https://doi.org/10.1029/2018JB017143

21. Q. Xue, E. Larose and L. Moreau, Locating structural changes in a multiple scattering domain with an irregular shape, J. Acoust. Soc. Am. (2019), https://doi.org/10.1029/2018JB017143

20. D. Marsan, J. Weiss, L. Moreau, F. Gimbert, M. Doble, E. Larose et J. Grangeon (2019), Characterizing horizontally-polarized shear and infragravity vibrational modes in the Arctic sea ice cover using correlation methods, J. Acoust. Soc. Am. (2019). https://doi.org/10.1121/1.5094343

19. C. Gradon, L. Moreau, P. Roux et Y. Ben Zion, Analysis of surface and seismic sources in dense array data with match field processing and Markov chain Monte Carlo sampling, Geophys. J. Int. (2019). https://doi.org/10.1093/gji/ggz224

18. L. Moreau, C. Lachaud, R. Thery, M. V. Predoi, D. Marsan, E. Larose, J. Weiss, and M. Montagnat, Monitoring ice thickness and elastic properties from the measurement of leaky guided waves : a laboratory experiment, J. Acoust. Soc. Am. (2017). https://doi.org/10.1121/1.5009933

17. M. Causse, G. Cultrera, L. Moreau, A. Herrero, E. Schiappapietra, and F. Courboulex, Bayesian rupture imaging in a complex medium. The 29 May 2012 Emilia, Northern Italy, earthquake, Geophys. Res. Lett.44 (2017), https://doi.org/10.1002/2017GL074698

16. L. Moreau, L. Stehly, P. Boué and M. Campillo, Improving ambient noise correlation functions with an SVD-based Wiener filter, Geophys. J. Int. 211(1), p. 418-426 (2017). https://doi.org/10.1093/gji/ggx306

15. F. Xie, E. Larose, L. Moreau, Y. Zhang, T. Planes : Characterizing extended changes in multiple scattering media using Coda Wave Decorrelation : numerical simulations, Waves Rand. Media (2017) . https://doi.org/10.1080/17455030.2017.1308042.

14. Y. Zhang, E. Larose, L. Moreau, G. d'Ozouville : 3D in-situ imaging of cracks in concrete using diffuse ultrasound, Structural Health Monitoring (2017). https://doi.org/10.1177/1475921717690938

13. P. Roux, L. Moreau, A. Lecointre, G. Hillers, M. Campillo, Y. Ben-Zion, D. Zigone and F. Vernon, A methodological approach toward high-resolution seismic imaging of the San Jacinto Fault Zone using ambient noise recordings at a spatially-dense array, Geophys. J. Int. 206 (2), p. 980-992 (2016) https://doi.org/10.1093/gji/ggw193

12. F. Xie, L. Moreau, Y. Zhang and E. Larose, A Bayesian approach for high resolution imaging of small changes in multiple scattering media, Ultrasonics 64(1), p. 106-114 (2016), https://doi.org/10.1016/j.ultras.2015.08.005

11. L. Moreau, A. J. Hunter, A. Velichko and P.D. Wilcox, 3D reconstruction of sub-wavelength scatterers from the measurement of scattered fields in elastic waveguides, IEEE Trans. Ultrason. Ferroelectr. Freq. Control 61(11) ; 1864-1879 (2014), https://doi.org/10.1109/tuffc.2014.006619

10. L. Moreau, J-G. Minonzio, M. Talmant et P. Laugier, Measuring the wavenumber of guided modes in a thickness-varying waveguide, J. Acoust. Soc. Am. 135(5) ; 2614-24 (2014), https://doi.org/10.1121/1.4869691

9. L. Moreau, J-G. Minonzio, J. Foiret, E. Bossy, M. Talmant et P. Laugier, Accurate measurement of guided modes in a plate using a bidirectional approach, J. Acoust. Soc. Am. 135(1), EL15-21 (2013), https://doi.org/10.1121/1.4832335

8. L. Moreau, M. Caleap, A. Velichko et P. D. Wilcox, Scattering of guided waves by flat-bottomed cavities with irregular shapes, Wave Motion 49(2), 375-387 (2012), https://doi.org/10.1016/j.wavemoti.2011.12.004

7. L. Moreau, A. Velichko et P. D. Wilcox, Accurate finite element modelling of guided wave scattering from irregular defects, NDT&E Int. 45(1), 46-54 (2012), https://doi.org/10.1016/j.ndteint.2011.09.003

6. L. Moreau, M. Caleap, A. Velichko et P. D. Wilcox, Scattering of guided waves by through-thickness cavities with irregular shapes, Wave Motion 48(7), 585-601 (2011), https://doi.org/10.1016/j.wavemoti.2011.04.010

5. L. Moreau, B. W. Drinkwater et P. D. Wilcox, Ultrasonic imaging algorithms with limited transmission cycles for rapid Non Destructive Evaluation, IEEE Trans. Ultrason. Ferroelectr. Freq. Control 56(9), 1932-1944 (2009), https://doi.org/10.1109/TUFFC.2009.1269

4. L. Moreau et M. Castaings, The use of an orthogonality relation for reducing the size of finite element models for 3D guided waves scattering problems, Ultrasonics, 48(5), 357-366 (2008), https://doi.org/10.1016/j.ultras.2008.01.005

3. M. V. Predoi, M. Castaings et L. Moreau, Influence of material viscoelasticity on the scattering of guided waves by defects, J. Acoust. Soc. Am 124(5), 2883-2894 (2008), https://doi.org/10.1121/1.2977604

2. B. Hosten, L. Moreau et M. Castaings, Reflection and transmission coefficients for guided waves reflected by defects in viscoelastic material plates, J. Acoust. Soc. Am. 121(6), 3409-3417 (2007), https://doi.org/10.1121/1.2723652

1. L. Moreau, M. Castaings, B. Hosten et M. V. Predoi, An orthogonality relation-based technique for post-processing finite elements predictions of wave scattering in solid waveguides, J. Acoust. Soc. Am. 120(2), 611-620 (2006), https://doi.org/10.1121/1.2216563

Patents under licence

1. L. Moreau, J-G. Minonzio, J. Foiret, M. Talmant et P. Laugier Procédé et dispositif ultrasonores pour représenter la propagation d'ondes ultrasonores dans un guide d'épaisseur linéairement variable, french patent #1357204 déposé le 22/07/2013 (2013)

Invited conferences and seminars

4. L. Moreau, Passive monitoring of sea ice Passive monitoring of sea ice, 7th edition of the school on Passive Imaging & Monitoring in Wave Physics : From Seismology to Ultrasound (2024), Cargèse (France)

3. L. Moreau, P. Boué, A. Serripierri, J. Weiss and S. Garambois, Imaging challenging media by full waveform inversion of ultrasonic signals, 173rd meeting of the Acoustical Society of America (2017), Boston (US)

2. L. Moreau, X. Fan, Y. Zhang and E. Larose, Imaging small changes in multiple scattering media, 13ème Congrès Français d'Acoustique, Le Mans, 2016

1. L. Moreau, Workshop « diffuse waves in complex media », Marseille (LMA), 2015

Conferences
25. A Charléty, M. Le Breton, M. Magnier, E. Larose, L. Baillet, L. Moreau and A. Van Herwijnen, Locating RFID Tags Under Snow and Vegetation, IEEE RFID (2025), Best paper award, https://2025.ieee-rfid-ta.org/best-paper-award/

24. H. Zandi, L. Moreau, L. Métivier, and R. Brossier, Sensitivity Study for Seismic Waves Guided in an Ice Pack : Influence of the Frequency Content and Snow Layer Thickness Covering the Ice, EGU General Assembly (2024)

23. A. Serripierri, L. Moreau, P. Boué and J. Weiss, Monitoring the Thickness and Mechanical Properties of Sea Ice with Approaches based on Passive Recordings of Seismic Noise, AGU Fall Meeting 2021

22. L. Moreau and L. Seydoux, Monitoring sea ice thickness and mechanical properties with seismic noise, 37th General Assembly (GA) of the European Seismological Commission (2021)

21. A. Serripierri, L. Moreau, P. Boué, and J. Weiss, Recovering and monitoring the thickness and elastic properties of sea ice from one month of seismic noise in Svalbard, EGU General Assembly Conference Abstracts, EGU21-10109

20. O. Coutant, L. Moreau, P. Boué, E. Larose, and A. Cimolino, Measuring floating ice thickness with optical fibers and DAS, a test case study on a frozen moutain lake, EGU General Assembly Conference Abstracts, EGU21-7404

19. L. Moreau, P. Boué, A. Serripierri and J. Weiss, Monitoring sea ice with seismic noise, Forum Acusticum, Lyon, 2020

18. L. Moreau, C. Lachaud, R. Thery, M. V. Predoi, D. Marsan, E. Larose, J. Weiss, and M. Montagnat, Monitoring sea ice thickness and properties with seismic noise : insights from a laboratory experiment, Congrès Français d'Acoustique, Le Havre, 2018.

17. C. Gradon, L. Moreau and P. Roux, Locating surface and shallow seismic sources using match field processing and a dense array of sensors on the San Jacinto Fault, AGU fall meeting, New Orleans, 2017.

16. L. Moreau, R. Brossier and L. Métivier, Imaging challenging media by full waveform inversion of ultrasonic signals, 173rd Meeting of the Acoustical Society of America, Boston, 2017

15. E. Larose, Y. Zhang, L. Moreau, T. Planes and A. Obermann, Diffuse ultrasound monitoring of stress and damage development on large scale concrete structures, 173rd Meeting of the Acoustical Society of America, Boston, 2017

14. M. Causse, G. Cultrera, A. Herrero, F. Courboulex, E. Schiappapietra, and L. Moreau, Finite-fault inversion of the Mw 5.9 2012 Emilia-Romagna earthquake (Northern Italy) using aftershocks as near-field Green's function approximations. In EGU General Assembly Conference Abstracts, Vienna, 2017

13. L. Moreau, E. Larose and R. Brossier, High resolution imaging in challenging media : a model-based approach, 22nd Internatinal Congress of Acoustics, Buenos Aires, 2016

12. L. Moreau, E. Larose and R. Brossier, Model-based reconstruction algorithms : a new frontier for super-resolution imaging in nondestructive evaluation ? Congrès Français d'Acoustique / Vishno, Le Mans, 2016

11. C. Gradon, L. Moreau, P. Roux, A. Lecointre and Y. Ben Zion, Extraction des ondes sismiques sur la faille de San Jacinto via le bruit sismique ambiant et un réseau dense de capteurs, Congrès Français d'Acoustique / Vishno, Le Mans, 2016

10. L. Moreau, X. Fan, Y. Zhang and E. Larose, Imaging several singularities in a multiple scattering medium, 22nd International Congress on Sound and Vibration, Florence, 2015

9. L. Moreau, X. Fan, Y. Zhang and E. Larose, Imaging small changes in multiple scattering media, AFPAC, Fréjus, 2015

8. L. Moreau, J G Minonzio, M. Talmant, and P. Laugier, Measuring the wavenumber of guided modes in a thickness-varying waveguide, AFPAC, Surrey (UK), 2014

7. L. Moreau, AJ Hunter and A. Velichko, Accurate 3D reconstruction of sub-wavelength defects from the measurement of guided wave scattered fields, AFPAC, Surrey (UK), 2014

6. L. Moreau, M. Caleap, A. Velichko and P. D. Wilcox, Analytical and finite element modelling of three-dimensional guided waves scattering by flat-bottomed cavities with arbitrary shapes, 11ème Congrès Français d'Acoustique, Le Mans, 2012

5. L. Moreau, A. Velichko and P.D. Wilcox, Efficient Methods to model the scattering of guided waves in 3D, Proc. SPIE 7650, Health Monitoring of Structural and Biological Systems, San Diego, 2010

4. L. Moreau, A. J. Hunter, B. W. Drinkwater and P. D. Wilcox , Efficient imaging techniques using an ultrasonic array, Proc. SPIE 7650, Health Monitoring of Structural and Biological Systems, San Diego, 2010

3. L. Moreau, A. J. Hunter, B. W. Drinkwater, and P. D. Wilcox, Efficient data capture and post-processing for realtime imaging using an ultraosnic array, AIP Conference Proceedings 1211, 839, 2010

2. L. Moreau and M. Castaings, Scattering of Lamb waves by a complex shaped defect in an isotropic plate, AIP Conference Proceedings 975, 62, 2008

1. M. Drozdz, L. Moreau, M. Castaings, M. J. S. Lowe, and P. Cawley, Efficient Numerical Modelling of Absorbing Regions for Boundaries Of Guided Waves Problems , AIP Conference Proceedings 820, 126, 2006.