Lynda Chehami - Associate Professor

Université Polytechnique Hauts-de-France INSA Hauts-de-France IEMN – site de Valenciennes, CNRS UMR 8520 CNRS
Welcome to my website to learn more about my research and teaching activities!

I am an Associate Professor (HDR) in Physical Acoustics at Université Polytechnique Hauts-de-France and INSA Hauts-de-France. My research focuses on ultrasonic wave propagation, passive imaging, and wave correlation in complex and reverberant media, with applications to the characterization of thin films, multilayer systems, and advanced materials. Since 2022, I have been serving as Chair of the Ultrasounds Technical Committee of the European Acoustics Association (EAA).

Curriculum Vitae
Lynda Chehami
Education
  • <strong>Université Polytechnique Hauts-de-France</strong><br/>
    Université Polytechnique Hauts-de-France
    22 Sep. 2022
    Habilitation to Supervise Research (HDR) in Acoustics
    Title: Passive imaging and wave correlation in complex and reverberant media
    IEMN Laboratory
    HDR Manuscript
  • <strong>Université Polytechnique Hauts-de-France</strong><br/>
    Université Polytechnique Hauts-de-France
    1 Dec. 2015
    PhD in Electronics and Acoustics
    Title: Passive imaging and Green's function retrieval from diffuse elastic waves in plates
    IEMN Laboratory & Institut Langevin
    PhD Manuscript
  • <strong>Université Montpellier 2</strong><br/>
    Université Montpellier 2
    2012
    Master's Degree in Sensors and Associated Systems
Honors & Awards
  • Awarded by Université de Valenciennes for outstanding doctoral research contributions in physical acoustics and ultrasonic wave physics.
  • Best Presentation Award – Franco-Lebanese Days
    2013
    Award for the best oral presentation at an international scientific conference, recognizing clarity, scientific rigor, and impact of the research work.
  • First Rank Graduation Award in Electronics
    2009
    Awarded for ranking first in the graduating class in Electronics, demonstrating academic excellence and outstanding performance throughout undergraduate studies.

News

2026
18 November 2026

EUNICE Synergy 2026 Congress

I was honored to co-organize the first edition of the EUNICE Synergy Congress, held in Valenciennes within the framework of the European University Alliance EUNICE.

The congress brought together researchers, students, institutional representatives, and socio-economic stakeholders around major challenges related to mobility, energy, climate, and sustainable innovation.

This event reflects the collective effort and enthusiasm of numerous colleagues, collaborators, and international partners involved in strengthening scientific and educational cooperation across Europe.

More information about the congress is available here:
EUNICE Synergy Congress – ScienceConf

2025
23 June 2025

International Jury Member – Forum Acusticum 2025 Best Paper Award

I am pleased to announce that I served as an international external jury member for the “Best Paper Award” at the Forum Acusticum 2025 conference, held in Málaga, Spain.

It was a great honor to contribute to the evaluation of outstanding scientific contributions in acoustics alongside the international community.

Forum Acusticum 2025 – Málaga

2023
15 September 2023

International Jury Member – Forum Acusticum 2023 Best Paper Award

I am pleased to announce that I served as an international external jury member for the “Best Paper Award” at the Forum Acusticum 2023 conference, held in Turin, Italy.

It was a great honor to contribute to the evaluation of outstanding scientific contributions in acoustics alongside the international community. Forum Acusticum 2023 – Turin

2022
22 June 2022

GdR Ondes-webinar on unconventional imaging modalities

I had the pleasure of being invited today by T. Fromentèze to give an invited talk on passive imaging in complex media.

Many thanks for the invitation and for the stimulating scientific discussions around ambient noise correlations, diffuse wavefields, and passive imaging of complex structures.

🎥 The replay is available here:

“Innovative Approaches for Structural Health Monitoring Applications Using Sensor Networks” More information about the congress is available here:
GdR Ondes-webinar on unconventional imaging modalities

2021
21 July 2021

ANR JCJC DACLOS Project Funding

I was honored to receive the ANR Young Researcher Grant (JCJC) for the DACLOS project.

This funding supports the development of innovative approaches in ultrasonic wave physics, passive imaging, and wave correlation in complex and reverberant media, with applications to advanced materials and structural characterization.

More information about the project is available here:
DACLOS Project

2018
15 July 2018

Invited Seminar at I2M Bordeaux on Passive SHM Using Sources of Opportunity-APY days

I was pleased to be invited for a two-day research visit at the I2M laboratory in Bordeaux by Prof. O. Poncelet and Dr. S. Rodriguez during the APY DAY event in July 2018.

During this visit, I gave an invited seminar on nondestructive defect inspection using distributed sensor networks and sources of opportunity, highlighting passive approaches for Structural Health Monitoring (SHM) under real operating conditions.

The seminar focused on innovative passive imaging and correlation-based methodologies as a step toward passive SHM in complex media.

2015
26 November 2015

Early Career Award

I was honored to receive the Early Career Award from the University of Valenciennes and Hainaut-Cambrésis.

This distinction represents far more than a personal achievement. It reflects the privilege of working alongside outstanding colleagues, collaborators, and young researchers whose talent, dedication, and enthusiasm continuously inspire me.

More information about the award ceremony is available here:
Talents des Chercheurs – Université de Valenciennes

2014
02 July 2014

Invited research stay at the Los Alamos National Laboratory (LANL)-New Mexico, USA

I am pleased to announce my invited research stay at the Los Alamos National Laboratory (LANL), New Mexico, USA, hosted by Professor Paul Johnson in July 2014.

During this visit, I had the honor of giving a plenary lecture presenting my research activities.

Many thanks to Paul Johnson for the invitation and the enriching scientific exchanges.

Selected Recent Publications (view all )
Detection and localization of a defect in a reverberant plate using acoustic field correlation
Detection and localization of a defect in a reverberant plate using acoustic field correlation

Lynda Chehami, Emmanuel Moulin, Julien de Rosny, Claire Prada, O. B. Matar, Farouk Benmeddour, Jamal Assaad

📘 Journal of Applied Physics 115(10) : 104901 (2014) Q1

This work investigates passive defect detection and localization in reverberant elastic plates using acoustic field correlation techniques. The study demonstrates the potential of diffuse ultrasonic wavefields and correlation-based approaches for structural health monitoring in complex media.

Detection and localization of a defect in a reverberant plate using acoustic field correlation

Lynda Chehami, Emmanuel Moulin, Julien de Rosny, Claire Prada, O. B. Matar, Farouk Benmeddour, Jamal Assaad

📘 Journal of Applied Physics (2014) Q1

This work investigates passive defect detection and localization in reverberant elastic plates using acoustic field correlation techniques. The study demonstrates the potential of diffuse ultrasonic wavefields and correlation-based approaches for structural health monitoring in complex media.

Source localisation in a reverberant plate using average coda properties and early signal strength
Source localisation in a reverberant plate using average coda properties and early signal strength

Hossep Achdjian, Emmanuel Moulin, Farouk Benmeddour, Jamal Assaad, Lynda Chehami

📘 Acta Acustica united with Acustica 100(5) : 834-841 (2014) Q2

This work proposes source localization approaches in reverberant plates based on average coda properties and early signal strength analysis.

Source localisation in a reverberant plate using average coda properties and early signal strength

Hossep Achdjian, Emmanuel Moulin, Farouk Benmeddour, Jamal Assaad, Lynda Chehami

📘 Acta Acustica united with Acustica (2014) Q2

This work proposes source localization approaches in reverberant plates based on average coda properties and early signal strength analysis.

Visualization of subsurface damage in woven carbon fiber-reinforced composites using polarization-sensitive terahertz imaging
Visualization of subsurface damage in woven carbon fiber-reinforced composites using polarization-sensitive terahertz imaging

Junliang Dong, Pascal Pomarède, Lynda Chehami, Alexandre Locquet, Fodil Meraghni, Nico F. Declercq, D. S. Citrin

📘 NDT & E International 99 : 72-79 (2018) Q1

Polarization-sensitive terahertz imaging is applied to characterize subsurface damage in woven carbon fiber-reinforced composite laminates. Terahertz subsurface spectral imaging combined with terahertz deconvolution is used to detect and visualize damage mechanisms in composite structures.

Visualization of subsurface damage in woven carbon fiber-reinforced composites using polarization-sensitive terahertz imaging

Junliang Dong, Pascal Pomarède, Lynda Chehami, Alexandre Locquet, Fodil Meraghni, Nico F. Declercq, D. S. Citrin

📘 NDT & E International (2018) Q1

Polarization-sensitive terahertz imaging is applied to characterize subsurface damage in woven carbon fiber-reinforced composite laminates. Terahertz subsurface spectral imaging combined with terahertz deconvolution is used to detect and visualize damage mechanisms in composite structures.

Accuracy of Green's Function Estimation from Correlation of Diffuse Elastic Waves on Thin Plates
Accuracy of Green's Function Estimation from Correlation of Diffuse Elastic Waves on Thin Plates

Lynda Chehami, Emmanuel Moulin, Julien de Rosny, Claire Prada

📘 The Journal of the Acoustical Society of America (JASA) 146(5) : 3505 (2019) Q1

This work investigates the accuracy of Green's function reconstruction from the correlation of diffuse elastic waves in thin plates, with emphasis on reverberation, modal density, and passive imaging performance in complex media.

Accuracy of Green's Function Estimation from Correlation of Diffuse Elastic Waves on Thin Plates

Lynda Chehami, Emmanuel Moulin, Julien de Rosny, Claire Prada

📘 The Journal of the Acoustical Society of America (JASA) (2019) Q1

This work investigates the accuracy of Green's function reconstruction from the correlation of diffuse elastic waves in thin plates, with emphasis on reverberation, modal density, and passive imaging performance in complex media.

Sparse guided wave imaging in highly anisotropic plates with phase skewing and amplitude focusing compensation
Sparse guided wave imaging in highly anisotropic plates with phase skewing and amplitude focusing compensation

Pierre Goislot, Guillemette Ribay, Emmanuel Moulin, Lynda Chehami

📘 The Journal of the Acoustical Society of America (JASA) 157(5) : 3390-3401 (2025) Q1

This work proposes sparse guided-wave imaging approaches in highly anisotropic plates including phase skewing correction and amplitude focusing compensation for improved defect localization and imaging performance in complex structures.

Sparse guided wave imaging in highly anisotropic plates with phase skewing and amplitude focusing compensation

Pierre Goislot, Guillemette Ribay, Emmanuel Moulin, Lynda Chehami

📘 The Journal of the Acoustical Society of America (JASA) (2025) Q1

This work proposes sparse guided-wave imaging approaches in highly anisotropic plates including phase skewing correction and amplitude focusing compensation for improved defect localization and imaging performance in complex structures.

All publications