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Workshop 6

« Industrial days on new acoustic treatments, acoustic metamaterials and sonic crystals »

The sixth workshop « Industrial Days on New Acoustic Treatments, Metamaterials and Sonic Crystals” organised by COST Action DENORMS took place from February 28th to March 1st in Athens, Greece.

The objective of the workshop was to facilitate dialogue and establish new collaborations between industry and academia on the topics of new acoustical materials / metamaterials. 10 companies and 8 university research groups participated in the event. The program included presentations, group work and social activities.

Each participating company had the opportunity to present its unique development capacities, products and processes (20 min + 5 min of questions) and was encouraged to propose an informal discussion topic.

COST Action DENORMS provided 30 grants covering the costs of meals and accommodation for participants in Athens.

The following companies participated in the Workshop:

  • Recticel
  • St Gobain
  • BASF
  • Trèves Group
  • Carbon Air
  • Dyson
  • Embraer
  • Matelys
  • Acoustic Metamaterials Group
  • Safran Group

The agenda is available here.

National Technical University of Athens
Zografou Campus
9, Iroon Polytechniou str
15780 Zografou


M. Gontier (Recticel), Technical polyurethane foam …. Acoustic performance through Chemical design

P. Leroy (St Gobain), Mineral wool and plaster board : Fabrication process, applications in buildings and opportunities for metamaterials

R. De Oliveira (BASF), Processing and chemistry for acoustic foams

A. Duval (Trèves Group), Microstructure morphology control of porous materials through processes: a manufacturing technology overview

R. Venegas (Carbon Air), Applications of multiscale porous materials in dynamics and acoustic

B. Van Damme (EMPA, Materials Science and Technology), Dealing with nonlinearity: practical measurement and modeling strategies

C. Perrot (MSME, Univ. Paris Est), Multisclale prediction of acoustic properties for glass wools: Computational study and experimental validation

I. Antoniadis (NTUA), Active and passive noise mitigation activities in DSL, NTUA

A. Paradeisiotis, I. Antoniadis (NTUA), Noise Control at the Low Frequency Range

T. Zielinski (IPPT PAN), Sound propagation and absorption in open-porosity media: Microstructure-based modelling and experimental validation

I. Perez (Dyson), Designing for acoustics: Aero-Acoustics Research at Dyson

S. Futatsugi (Embraer), A preliminary study on the use of resonant acoustic metamaterial on aircraft noise control treatment

L. Jaouen (Matelys), Characterization and modelling challenges of multiple dynamics materials aka metamaterials

S. Chen (AMG), Acoustic Metamaterials for Noise Control

J. Mardjono (Safran Group), Overview of SAFRAN acoustic absorbing material for aircraft/cabin noise reduction and future challenges

E. Deckers (KULeuven), Vibroacoustic locally resonant metamaterials applications

M. Cervenka (Czech Technical Univ. in Prague), Optimized reactive silencers composed of elongated side-branch resonators

P. H. Mareze (Coimbra Univ.), Acoustic parameters dispersion of aeronautical materials used for noise control, and prospects studies about optimized pore geometry

J.-P. Groby (LAUM, UMR CNRS 6613), Control of the acoustics waves in the subwavelength regime: metamaterials for perfect absorption and metadiffusers


Metamaterials 2017

Special Session « Acoustic metamaterials for noise reduction » in Metamaterials 2017

The Eleventh International Congress on Artificial Materials for Novel Wave Phenomena – Metamaterials 2017 was held on 27th to 31st August 2017 in Marseille, France.

DENORMS Action (CA15125) and the working group Audible Acoustic Metamaterials of the GdR META organised a Special Session « Acoustic metamaterials for noise reduction ». This special session goal was to provide timely and high level presentations in the design of innovative, light, thin, and multi-functional noise reducing treatments and to develop objective and subjective methods and standards for their performance characterization and exploitation. This session aimed at bringing together scientists and engineers working on MetaMaterials/MetaSurfaces/Sonic Crystals and non-conventional porous material based structures.

Topics included:

  • Acoustic metamaterials, graded media, phononic crystals,
  • Linear/nonlinear wave propagation in periodic structures,
  • Homogenization of audible composites,
  • Modulated phononics crystals and metamaterials,

For more information, see the meeting website

Workshop 5

« Symposium on Acoustic Metamaterials (SAM) »


The fifth DENORMS workshop « Symposium on Acoustic Metamaterials” (SAM) took place from November 7 to 9, 2018 in Xàtiva (Spain), organised by YRAM (Young Researcher in Acoustic Metamaterials) and Universitat Politècnica de València.

This first Symposium on Acoustic Metamaterials was targeted to Early Career Investigators  (i.e. researcher whose career spun less than 8 years since the date of the PhD) and PhD candidates and aimed at sharing new advances and breakthroughs as well as fostering the community of young researchers in the field of acoustic metamaterials. The first SAM was organised around 6 different sessions comprising 20 min talks and 4 plenary lectures.

Topics covered by SAM are listed below but not restricted to:

  • Acoustic/elastic metamaterials and phononic crystals
  • Acoustic/elastic metasurfaces
  • Non-reciprocal manipulation of acoustic/elastic waves
  • Acoustic/elastic meta-devices based on transformation acoustics, parity-time symmetric acoustics, topological acoustics
  • Novel physical concepts for harnessing acoustic/elastic waves
  • New applications of metamaterial-based functional devices for acoustic sensing, cloaking, imaging, absorption, energy harvesting, etc.

Several social activities have been organised during the symposium.

The pictures of this SAM are available here.

You may read the book of abstracts, which is available here.

For more information, see the SAM website.

Scientific Committee

Steven Cummer (Duke University, USA)
Luis Miguel Garcia-Raffi (Universitat Politècnica de València, Spain)
Jean-Philippe Groby (LAUM, UMR CNRS 6613, France)
Rubén Picó (Universitat Politècnica de València, Spain)
Vicente Romero-Garcia (LAUM, UMR CNRS 6613, France)
José Sanchez-Dehesa (Universitat Politècnica de València, Spain)
Victor Sánchez-Morcillo (Universitat Politècnica de València, Spain)
Daniel Torrent (Universitat Jaume I, Spain)
Olga Umnova (University of Salford, UK)
Martin Wegener (Karlsruhe Institute of Technology, Germany)

Organising Committee

YRAM: Matthieu Malléjac, Théo Cavalieri, Weichun Huang (LAUM, UMR CNRS 6613), and Joseph Beadle (Exeter University)
Local organisers: Víctor Sánchez Morcillo, Rubén Picó, Luis Miguel Garcia Raffi (Universitat Politècnica de València), and Vicent Romero-Garcìa (LAUM, UMR CNRS 6613)
DENORMS Action CA15125:
Jean-Philippe Groby (DENORMS Chair)
Olga Umnova (DENORMS Vice-Chair)
Mélanie Garcia Villar (DENORMS Grant Manager)
Daniel Torrent (Working Group 1 Leader)
Tomasz Zielinski (Working Group 1 Co-Leader)
Bart Van Damme (Working Group 2 leader)
Nicolas Dauchez (Working Group 2 Co-Leader)
Arnaud Duval (Working Group 3 Leader)



Invited talk

F. Lemoult, G. Lerosey, M. Fink, S. Yves, N. Kaina, R. Fleury, Soda cans: acoustic Helmholtz resonators for controlling the propagation

Contributed talks

W. Huang, L. Schwan, V. Romero-García, J.-M. Génevaux, J.-P. Groby, Straw-inspired anisotropic metamaterial for sound absorption

N. G. R. de Melo Filho, L. Van Belle, C. Claeys, E. Deckers, W. Desmet, Sound transmission loss enhancement of double panel partitions at their mass-spring-mass resonance using resonant metamaterials

K. Li, N. Dauchez, B. Nennig, E. Perrey-Debain, Strengthened Attenuation of Low Frequency Sound in a Duct by Using a Poroelastic Lamella Material 

C. Casarini, Characterization of 3D printed thin membranes for low-frequency noise attenuation in small-scale applications

M. Malléjac, A. Merkel, J. Sanchez-Dehesa, J. Christensen, V. Tournat, V. Romero-Garcia, J.-P. Groby, Limits of mass density for acoustic metamaterials composed of clamped elastic plates

A. Geslain, V. Romero-García, J.-P. Groby, F. Cervera, J. Sanchez-Dehesa, Acoustic characterization of Silica aerogel clamped plates for perfect absorption purpose

A. A. Fernandez-Marin, V. Romero-Garcia, J.-P. Groby, N. Jimenez, F. Cervera, J. Sanchez-Dehesa, Perfect and broadband acoustic absorption by metasurfaces made of aerogel clamped plates

I. Herrero-Dura, A. Cebrecos, V. Romero-Garcia, L.M. Garcia-Raffi, N. Jimenez, R. Pico and V.J. Sanchez-Morcillo, Use of Sonic Crystals for noise mitigation in the launch pad

G. Shankar Sharma, A. Skvortsov, I. MacGillivray and N. Kessissoglou, Acoustic Performance of Phononic Crystals for Underwater Coating Applications 

W. Choi, J. Hyun, Experimental realization of a underwater double-zero-index phononic crystal with Dirac-like point

V. Hruska, M. Bednarık, M. Cervenka, Sound emission due to the airflow through a sonic crystal

P. Daly, An ultrasonic acoustic beam shifter

T. Cavalieri, J.-P. Groby, V. Romero-Garcia, L. Schwan, G. Gabard M. Escouflaire, J. Mardjono, Acoustic wave propagation in graded effective anisotropic fluid layers under oblique incidence

P. Fossat, C. Boutin, M. Ichchou, Periodic homogenization of ribbed plates with inner resonance

E. Kalavsky & R. Venegas, Low-frequency sound absorption of rigidly-backed waveguides laterally loaded by acoustic resonators

N. Sharma, O. Umnova, Modelling of acoustic black hole effect based mufflers 

T. Bravo, C. Maury, Enhancing Broadband Absorption through Functionally-Graded Perforated Materials

M. Farooqui, Y. Aurégan, V. Pagneux, One dimensional modelling of self-cloaking inside ducts using liners

O. Yerli, S. Kaya, Plant usage potential in noise control

I. Bashir, C. Courtney and M. Carley, Development of light-weight, integrated and multifunctional acoustic metamaterials/metasurfaces to reduce noise from next generation aero-engines: modelling and data

T. Wang, Tunable Transmission Properties of Acoustic Waves Propagating in a Waveguide Grafted with Acoustic Resonators by Filling Liquids

O. Florez, P.F. Jarschel, Y.A.V. Espinel, C.M.B. Cordeiro, T. P. Mayer Alegre,
G.S. Wiederhecker, P. Dainese, Observation of Brillouin scattering self-cancellation in silica nanowires

J. Zhang, V. Romero García, G. Theocharis, O. Richoux, V. Achilleos, D.J. Frantzeskakis, Dissipative Envelope Solitons in 1D Acoustic Metamaterials 

A. Ghatak, Non-hermitian systems and metamaterials: more perspective

J. Leng, V. Romero-Garcia, J.P. Groby, R. Pico, A. Pelat, F. Gautier, Absorption of flexural waves using critical coupling condition

L. Sangiuliano, C. Claeys, E. Deckers, W. Desmet, Influence of the boundary conditions and control of edge resonances in finite locally resonant metamaterials

V. Slesarenko, P. Galich, J. Li, N. Fang, S. Rudykh, Negative group velocity state in the vicinity of elastic instability in soft composites

E. Ballestero, D.J. Shearer, S. Dance, Ha. Aygun, V. Romero-Garcia, N. Jimenez, Acoustic diffusers and metadiffusers in orchestra pits, the good, the bad and the loony 

Y. Fu, G. Yeoh, Z. Peng, C. Wang, J. Fischer, Underwater acoustic performance of aligned nano-carbon materials in a soft elastic medium



Workshop 4

« Working days on design and characterisation of innovative noise reducing materials and structures »


DENORMS Action’s forth Workshop “Working days on design and characterisation of innovative noise reducing materials and structures” took place October 9 – 10, 2018 in Kuopio (Finland), and was organised by University of Eastern Finland.

The aim of this workshop was to foster collaboration and exchange of ideas between researchers working on different topics centred around noise reducing treatments. 6 groups have been established.

Within each group the participants developed a detailed collaboration program. The outcomes of each program were new grant applications, publications, and detailed work plan – all to be completed within a year from the date of the meeting.

For more information, see the Workshop flyer and tentative agenda.

You can see some pictures here.

Organising committee

Timo Lähivaara (Local organiser)
Jean-Philippe Groby (DENORMS Chair)
Olga Umnova (DENORMS Vice-Chair)
Mélanie Garcia Villar (DENORMS Grant Manager)
Daniel Torrent  (Working Group 1 Leader)
Tomasz Zielinski (Working Group 1 Co-Leader)
Bart Van Damme (Working Group 2 leader)
Nicolas Dauchez (Working Group 2 Co-Leader)
Arnaud Duval (Working Group 3 Leader)

Working groups

1/ ALFACOM: Scrosati Chiara (Group Leader), Scamoni Fabio, Piana Edoardo, Roozen Nicolaas Bernardus

2/ MetaNEl: Van Damme Bart (Group Leader), Umnova Olga, Jiménez Noé, Dauchez Nicolas, Cveticanin Livija

3/ Absorbers for Additive Manufacture: Attenborough Keith (Group Leader), Leclaire Philippe, Perrot Camille, Zielinski Tomasz, Haladin Ivo

4/ DECIBEL: Gaborit Mathieu (Group Leader), Lähivaara Timo, Cuenca Jacques, Ogam Erick, Hyvönen Nuutti

 5/ Urban Crystal: Stojiljkovic Milan (Group Leader), Groby Jean-Philippe, Romero-Garcia Vicente, Sanchez-Dehesa Jose, Amado-Mendes Paulo, Dimitrijevic Stefan

6/ METANOC: Carbajo Jesus (Group Leader), Chazot Jean-Daniel, Godinho Luis, Cutanda Vicente, Risby Andersen Peter


University of Eastern Finland – A multidisciplinary and international university

M. Vauhkonen, Inverse problems research at the Department of Applied Physics, UEF


ISMA 2018

Special session at the ISMA2018 Noise and Vibration Engineering Conference

A DENORMS special session will be held during the ISMA2018 Noise and Vibration Engineering Conference. The conference is organised by the division PMA of the KU Leuven in Leuven (Belgium) from 17 to 19 September 2018.

Abstracts for this special session can be submitted via the regular procedure of the conference, which can be found on, but ‘DENORMS’ must be entered in the remarks field to the programme committee.

The deadline of the abstract submission for  special sessions is 15/02/18.

The ISMA2018 Noise and Vibration Engineering Conference is the 2018’s edition of a sequence of biennial international conferences on noise and vibration engineering, structural dynamics and modal testing. Since 2012 the ISMA conference is organized in conjunction with the USD conference on Uncertainty in Structural Dynamics. The 2016 edition of ISMA/USD conference was attended by more than 600 participants from academia and industry. The technical programme counted approximately 450 technical papers scheduled into 8 parallel tracks and 4 plenary poster sessions. Full conference proceedings will be published digitally and submitted for reference in the ISI Web of Science. A single registration will grant access to both the ISMA and the USD conference.

For more information, see the meeting website or contact the ISMA Conference secretary, Mrs. L. Notré

Workshop 3

« Dedicated manufacturing and experimental techniques for acoustic metamaterials and acoustic treatments »

DENORMS Action’s third Workshop on “Dedicated manufacturing and experimental techniques for acoustic metamaterials and acoustic treatments” was held from 5th to 7th February 2018 in Leuven (Belgium), co-organised by KU Leuven and Siemens Industry Software NV.

In this occasion, leading experts shared their knowledge with other researchers, PhD students, young scientists and engineers from all across Europe. Three sessions, each introduced by a plenary lecture, were proposed:

  • Psychoacoustics of metamaterials and acoustic treatments
  • Experimental techniques for testing metamaterials and vibro-acoustic treatments
  • Manufacturing techniques for acoustic and mechanical metamaterials

Three Working Group meeting were held in the framework of the Workshop.

For more information, see the Workshop flyer and agenda.

Organising Committee

Jean-Philippe Groby (DENORMS Chair)
Olga Umnova (DENORMS Vice-Chair)
Nicolas Dauchez (Working Group 2 Co-Leader)
Monika Rychtarikova (Working Group 2 Co-Leader)
Pauline Rasera (DENORMS Grant manager)
Laurent De Ryck (Siemens Industry Software NV)
Jacques Cuenca (Siemens Industry Software NV)
Elke Deckers (KU Leuven)
Christ Glorieux (KU Leuven)

Scientific Committee

Elke Deckers (KU Leuven/PMA, Belgium)
Laurent de Ryck (Siemens Industry Software NV, Belgium)
Wim Desmet  (KU Leuven/PMA, Belgium)
Christ Glorieux  (KU Leuven/FYS, Belgium)
Bert Roozen  (KU Leuven/FYS, Belgium)
Monika Rychtarikova (KU Leuven/BWK, Belgium)
Kristian Jambrosic (University of Zagreb, Croatia)
Nicolas Dauchez (UTC Compiègne, France)
Henry Rice (Trinity College, Ireland)
Chiara Scrosati (ITC CNR, Italy)
Jesus Carbajo (Universidad de Alicante, Spain)
Bruce Drinkwater (University of Bristol, UK)
Steven Cummer (Duke University, USA)


5th February – at Siemens Industry Software NV

6th February – at KU Leuven

Experimental techniques session

Psychoacoustics session

7th February – at KU Leuven

Manufacturing session 1

Manufacturing session 2

Workshop 2

« Sandpit: New approaches to design of noise reducing materials and structures »

DENORMS Action’s Brainstorming Workshop “Sandpit: New approaches to design of noise reducing materials and structures”, took place on 14th and 15th September 2017 in Novi Sad (Serbia), organised by University of Novi Sad.

The goal of this sandpit was to develop new ideas and collaboration plans on the following topics:

  • Sound absorption by structured materials
  • Diffusers and metasurfaces
  • Sound insulation by structured materials
  • Landscape sound insulation by sonic crystals
  • Active structures and smart materials
  • Elastic energy mitigation
  • Vibroacoustic energy mitigation in thin walled structures
  • Characterisation of non-conventional porous materials and acoustic metamaterials

This sandpit was a timely and unique opportunity to achieve scientific breakthroughs in the identified topics and to enhance collaboration between the DENORMS members. To achieve this, brainstorming groups composed of 4-5 people from the 3 Action Working Groups worked together for 1 ½ days in a positive collaborative environment. Each brainstorming group nominated an Animator, in charge of leading the discussion and of reporting its outcomes. The expected outcomes for each group were: new concepts and approaches, detailed work plan including a tentative schedule of joint grants applications, publications and STSM). They were reported and discussed during the feedback session in the afternoon of 15th Sept. 2017 (½ day). For more information, see the Flyer.

The pictures of the Workshop are available here.

Organising committee

Anton Krynkin and Tomasz G. Zieliński (Working Group 1 Leaders)
Monika Rychtarikova and Nicolas Dauchez (Working Group 2 Leaders)
Arnaud Duval (Working Group 3 Leader)
Livija Cveticanin (Local organiser)
Olga Umnova (DENORMS Action co-Chair)
Jean-Philippe Groby (DENORMS Action Chair)
Pauline Raséra (Grant manager)

Metamaterials 2017 – Side event

DENORMS – GDR Meta thematic day « Industrial applications of acoustic metamaterials »

DENORMS Action and the GdR META organised in Marseille on 1st September 2017 a thematic day dedicated to Industrial applications of acoustic metamaterials. This event aimed at gathering industrial and academic partners to discuss and exchange views. It was structured around presentations given by leading industrial partners in various fields of applications. The talks introduced current issues, new trends or metamaterial-based solutions already implemented in a practical context. Coffee breaks, poster sessions and panel discussions took place throughout the day in order to foster informal exchanges among the participants. This thematic day was organised as a side event of the Metamaterials 2017 Congress, allowing the participants to combine an industrial and practical perspective on acoustic metamaterials with an overview of the state-of-the art of the domain.

Participation was open to all, students, researchers, engineers or technical staff from academia or industry.

Confirmed industrial speakers

Marc Versaevel, AIRCELLE-SAFRAN,
Jérôme Defrance, CSTB
Christian Audoly, DCNS
Nicolas Etaix, Dyson-UK
Stéphane Brulé, Menard
Clément Lagarrigue, METACOUSTIC
Frank Simon, ONERA
Raphaël Lardat, Thales Underwater Systems
Arnaud Duval, Treves group

IcETRAN 2017

Special session « Noise control using acoustic metamaterials, metasurfaces and sonic crystals as well as porous materials » 

The 4th International Conference on Electrical, Electronic and Computing Engineering – IcETRAN 2017 co-located with the 61st National Meeting ETRAN was held on 5th to 8th June 2017 in Kladovo, Serbia.

A session on « Acoustics and Audio Signals » and a special session/round table devoted to noise control using acoustic metamaterials, metasurfaces and sonic crystals as well as porous materials has been organised.
During this session, information about COST Action DENORMS (CA15125) was disseminated and potentials for future joint actions and cooperation discussed. This session was a unique opportunity to bring together DENORMS parcipants from Serbia and neighbouring countries, but also from all around Europe. The invited talk entitled « From metaporous materials to subwavelength absorbers: some recipe to design perfect sound absorbers » was given by Mr. Jean-Philippe Groby, DENORMS Action Chair.
The conference was organised with the support of IEEE.

For more information, please contact or see the Conference website

Training Schools 1 and 2

« Sound waves in metamaterials and porous media »

DENORMS Action Training Schools 1 and 2 took place in Prague (CZ), organised and hosted by Czech Technical University in Prague (České vysoké učení technické v Praze, CTU) from 26th to 30th September 2016.


More than 50 trainees participated in these training schools that aimed at providing a common theoretical background to researchers and engineers working on acoustic metamaterials, metasurfaces and sonic crystals as well as conventional acoustic materials. 37 trainees received a COST grant.

For more information, see the flyer and agenda of the week.

Organising committee

Milan Červenka (CTU-FEL), local organiser
Anton Krynkin (Univ. of Sheffield), Working Group 1 Leader
Tomasz Zieliński (Polish Academy of Sciences), Working Group 1 co-leader
Pauline Raséra (LAUM , UMR CNRS 6613), Grant Manager
Olga Umnova (Univ. of Salford), Action Vice-Chair
Jean-Philippe Groby (LAUM , UMR CNRS 6613), Action Chair

Videos of the lectures

 Pictures of the Training Schools


Pictures are available here.