« 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

AGENDA
The agenda is available here.

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

PRESENTATIONS  

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

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:

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 https://www.isma-isaac.be/isma2018/abstract-submission/, 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 http://www.isma-isaac.be or contact the ISMA Conference secretary, Mrs. L. Notré lieve.notre@kuleuven.be

« 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)

Presentations

5th February – at Siemens Industry Software NV

• S. Manzato, The role of modal testing and analysis in the model verification and validation process
• L. Farkas & O. Atak, NVH numerical methods and virtual material characterisation
• J. Cuenca & L. De Ryck, Acoustic characterisation of ground surfaces and muffler components

6th February – at KU Leuven

Experimental techniques session

• Keynote lecture: W. Desmet (KU Leuven), On the design, manufacturing and experimental testing of resonant acoustic metamaterials
• Van Damme (Empa), Reduced sound and vibration transmission through inertia-amplification metamaterial panels
• Sangiuliano (KU Leuven), Vibration isolation in a simplified shock tower by means of locally resonant metamaterials
• L. Schwan (LAUM), Characterisation of double-conductivity metaporous screens
• Glorieux (KU Leuven), Microscopic elastic characterization of poroelastic (meta)materials

Psychoacoustics session

• Keynote lecture: N. Côté (IEMN-Wavely), Sound of metamaterials: audible effects of sonic crystals?
• L. de Ryck (Siemens), K. Jambrošić (Univ. Zagreb), Introduction to jury testing

7th February – at KU Leuven

Manufacturing session 1

• Keynote lecture: M. Wegener (KIT), 3D mechanical metamaterials by 3D laser nanoprinting 
• Romero Garcia (LAUM), Technical limits of 3D printing by stereolithography techniques in the design of subwavelength perfect acoustic absorbers
• Casarini (Univ. Strathclyde), 3D printing acoustic metamaterials based on membranes and Helmholtz resonators
• Méndez Ribó (TUD), Reproduction of multi-hierarchical structural surfaces by vat-photopolymerization
• Kennedy (Trinity College), Theoretical and experimental validation of an acoustic metamaterial produced through additive manufacturing

Manufacturing session 2

• K. Attenborough (Open Univ.), Simple porous absorber microstructures for additive manufacture
• B. Drinkwater (Univ. Bristol), Realising digital acoustic metamaterials
• P. Amado Mendes (Univ. Coimbra), Metaporous concrete: a preliminary study
• P. Serrano (Univ. Southampton), Measurement and prediction of aero-engine liners in the presence of high sound pressure levels, multiple tones and grazing flow
• F. Scamoni (ITC CNR), Experimental techniques for testing innovative acoustic coating systems

« 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)

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

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 dejan.ciric@elfak.ni.ac.rs or see the Conference website https://www.etran.rs/2017/IcETRAN/About_Conference/

• Prof. J. Vasseur (IEMN UMR CNRS 8520, France): Irreducible Brillouin zone / dispersion relations (band structures) in periodic structures / Plan Wave Expansion method
• D. Torrent (Univ. Bordeaux, France): Multiple Scattering Theory
• Dr. C. Boutin (ENTPE, France): Homogenization theory applied to porous materials
• Dr. V. Romero García (LAUM UMR CNRS 6613, France): Periodic structures for sound waves. Sonic crystals
• Prof. P. Sheng (Hong Kong University of Science & Technology, Hong Kong, China): Metamaterials for sound absorption
• Dr. D. Lafarge (LAUM UMR CNRS 6613, France): Acoustic wave propagation in viscothermal fluids and nonlocal homogenization
• Prof. J. Sánchez Dehesa (UPV, Spain): Homogenization theory applied to periodic structures
• Prof. P. Göransson (KTH, Sweden): Numerical methods for modelling and simulation of porous materials
• Ms. M. Rodrigues (Embraer, Portugal): Acoustics in the aeronautic industry
• Dr. A. Duval (Trèves-group, France): Automotive acoustic package optimization methodology
• Dr. P. Leroy (Isover Saint-Gobain CRIR, France): Acoustics in buildings: role of porous materials and opportunities for metamaterials
• Dr. F. Coulouvrat (Institut Jean le Rond d’Alembert, France): An introduction to nonlinear acoustic wave propagation

 Pictures of the Training Schools

Pictures are available here.