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AlphaCell Training

AlphaCell is a complete and accurate TMM/FTMM solution used to simulate the vibro-acoustic response of multi-layer trims under various excitations (airborne, structure borne, turbulent boundary layer).

MATELYS is offering custom training for Altair customers of their AlphaCell software.

Click below to explore the training opportunities available:



AlphaCell Fundamentals

Course Objectives

  • Be acquainted with the principles of the TMM/FTMM method
  • Select the suited model for a given system
  • Be able to carry out complete computations for simple models and evaluate the relevance of the results

Training Agenda

Part 1: Generalities
  • Presentation of the TMM/FTMM method
  • Principles of the indicator computation
  • Modeling of the sound absorption
  • Modeling of the sound insulation
Part 2: Modeling of Materials and Systems
  • Porous material models
  • Elastic material models
  • Accounting for studs and mechanical shortcuts
Part 3: Interaction with AlphaCell
  • Format of input and output data
  • Using symbolic expressions
  • Assistant for result interpretation
  • Presentation of AlphaCell roadmap
Who Should Attend?
Operating technicians, process technicians, application engineers, design engineers, research engineers, researchers

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AlphaCell Expert

Course Objectives

  • Be acquainted with all the features of the available models
  • Be acquainted with all input and output data
  • Be able to identify the limits of TMM/FTMM method
  • Become AlphaCell expert user within a modeling team

Training Agenda

Part 1: Generalities
  • Reminder of the TMM/FTMM method
  • Representation in the wave number domain
  • Spatial windowing methods
Part 2: Models for Heterogeneous Porous
  • Model for compressed fibrous
  • Composite model: double porosity, inclusions, resonators
Part 3: Elastic Material Models
  • Equivalent plate models
  • Orthotropic porous and plates
  • Stud modeling
  • Corrugated plates and ribbed plates
Part 4: Additional Features
  • Presentation of scripting computations: input data and models
  • Parametrised simulations
  • Post-processing of the results
  • Post-usage of XML material cards
  • Presentation of AlphaCell roadmap
Who Should Attend?
Application engineers, design engineers, research engineers, researchers

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Porous Material Modeling - Basics

Course Objectives

  • Gain the knowledge of the basic characteristics of porous materials used in vibro-acoustic applications
  • Gain the knowledge in experimental methods dedicated to porous material characterization
  • Get acquainted with the levers for designing and optimizing an efficient sound package

Training Agenda

Part 1: Generalities
  • Modeling principles
  • Presentation of the main parameters related to the micro-structure
  • Illustration of the phenomena
  • Particular cases of thin porous materials
Part 2: Experimental Methods
  • Characterization of acoustic parameters
  • Characterization of thin porous materials
  • Characterization of elastic and damping properties
Part 3: Examples of Optimization cases
  • Influence the material association
  • Influence the microstructure
  • Demos and discussions using AlphaCell software product
  • Some topics may also be illustrated using web-based applications
Who Should Attend?
Commercial engineers, technical sales, operating technicians, process technicians, application engineers, design engineers, research engineers, researchers

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Porous Material Modeling - Advanced

Course Objectives

  • Get acquainted with the strategies of sound package modeling
  • Use optimization levers for an acoustically efficient design
  • Identify and select the adapted modeling approach for a prescribed sound package

Training Agenda

Part 1: Homogeneous Media
  • Review of the existing models
  • Fluid-structure coupling, accounting for elastic effects
  • Limp and rigid-body models
  • Coupling between several layers of a system
  • Review of the different formulations : (U,u), (p,u), (us,ut) …
Part 2: Model Condensation
  • Porous Material Models
  • Principles of upscaling approaches
  • Porous composites: rigid, elastic, porous, resonating inclusions
Part 3: Practical examples
  • Format of input and output data
  • Perforated plates
  • Assembly of materials
  • Calculation from a thickness map
  • Demos and discussions using AlphaCell software product
  • Some topics may also be illustrated using web-based applications
Who Should Attend?
Operating technicians, process technicians, application engineers, design engineers, research engineers, researchers

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Modeling of Perforated Plates and Resistive Screens

Course Objectives

  • Get acquainted with the main characteristics of a perforated plate or resistive screen used in vibro-acoustic applications
  • Get acquainted with the experimental methods related to the characterization of this type of materials
  • Acquire the levers for designing and optimizing an efficient sound package containing a perforated plate or a resistive screen

Training Agenda

Part 1: Generalities
  • Modeling principles, links with porous material theory
  • Principles of the length correction
  • Illustration of the phenomena
Part 2: Experimental Methods
  • Characterization of perforated plates and resistive screens using the impedance tube
  • Link with the measurement of the air flow resistivity (ISO 9053) and the permeability of fabrics (ISO 9237)
  • Influence of the porous deformation, membrane vibration
Part 3: Optimization Examples
  • Single perforated plate
  • Perforated plate with other materials
  • Perforated plate under high sound pressure level
  • Demos and discussions using AlphaCell software product
  • Some topics may also be illustrated using web-based applications
Who Should Attend?
Operating technicians, process technicians, application engineers, design engineers, research engineers, researchers

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Porous Materials in Flow

Course Objectives

  • Get acquainted with the main aeroacoustic phenomena related to the presence of a porous material in a flow
  • Acquire the levers for designing and optimizing an efficient sound package in these conditions

Training Agenda

Part 1: Generalities
  • Porous material characteristics and sound wave dissipation principles
  • Main characteristics of a flow
  • Interactions between a porous material and a flow
Part 2: Modeling
  • Presentation of the main modeling methods of a porous material under flow
  • Simple case of a liner
  • Boundary conditions at the domain limits
  • Case of a diaphragm
  • Porous material in a complex flow
  • Case of perforated plates under high sound pressure level
Part 3: Applications
  • Demos based on simulations obtained with Pro-LB and AlphaCell software
Who Should Attend?
Operating technicians, process technicians, application engineers, design engineers, research engineers, researchers

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Introduction to Acoustics

Course Objectives

  • understand and analyze the physical phenomena associated with the propagation of sound waves
  • Gain general working competences in acoustics
  • Integrate early vibro-acoustic considerations in a general design process

Training Agenda

Part 1: Acoustics – Generalities
  • General principles of acoustics
  • Different types of noise sources
  • Absorption Vs. insulation
Part 2: Acoustics – Regulation Issues
  • Regulation principles in buildings, transportation, industry and environment
  • Performance measurement: standardized and commonly used methods
Part 3: Toward an Optimized Acoustic Comfort
  • Modify the sound insulation properties:
    • Effect of porous material treatments
    • Influence of the treatment for a given base structure
    • Influence of the base structure on the treatment performance
  • Modify the sound absorption properties :
    • Influence of the absorption
    • Influence of the room volume
  • Influence of mounting conditions
  • Listening to various auditory scenes regarding sound absorption and sound insulation
Who Should Attend?
Technical sales, operating technicians, process technicians, application engineers, design engineers, research engineers, researchers

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Building Acoustics

Course Objectives

  • Gain general working competences in building acoustics
  • Acquire the basic notions to discuss with acoustic design offices
  • Integrate early vibro-acoustic considerations in a general design process of a building

Training Agenda

Part 1: Generalities
  • General principles of building acoustics: absorption, insulation
  • Noise sources in buildings
  • Measurement methods
Part 2: Regulation Issues
  • Presentation of main acoustic indicators: sound absorption coefficient, reverberation time, sound transmission loss, sound insulation
  • Measure of the performances: standardized and used methods
  • Regulated level in buildings
Part 3: Practical Examples
  • Modification of the insulation properties:
    • Influence of porous material linings
    • Influence of lining for a prescribed base structure
    • Influence of base structure on the lining performances
  • Modification of the absorption properties:
    • Influence of the sound absorption
    • Influence of the room volume
    • Other influencing factors
  • Listening of various sound scenarios for the acoustic correction and sound insulation
Who Should Attend?
Technical Sales, operating technicians, process technicians, application engineers, design engineers, research engineers, researchers

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Transportation Acoustics

Course Objectives

  • Acquire a global view on vibro-acoustic issues for transportation applications
  • Gain to know the stakes of abatement measures for interior and exterior noise emission

Training Agenda

Part 1: Generalities
  • Transportation noise sources and their frequency distribution
  • Regulation
Part 2: Noise Sources: Characterization and Treatment
  • Characterization of noise sources
  • Treatment of noise sources
  • Characterization of sound packages
Part 3: Practical Examples
  • Predictive methods
  • Trends and stakes in automotive, railway, aeronautics, marine applications
Who Should Attend?
Technical Sales, operating technicians, process technicians, application engineers, design engineers, research engineers, researchers

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Introduction to The Numerical Methods for Acoustics

Course Objectives

  • Acquire a global view of numerical methods used in vibro-acoustics
  • Be able to choose an adapted method for a prescribed problem

Training Agenda

Part 1: General Methods and Practical Examples
  • FEM (Finite Element Method)
  • BEM (Boundary Element Method)
  • SEA (Statistical Energy Analysis)
  • Energetical methods (Radiosity
  • FDTD (Finite Difference in Time Domain)
  • Ray-tracing
  • LBM (Lattice Boltzmann Method)
  • TMM (Transfer Matrix Method)
  • Wave-based methods
Part 2: Complementary Techniques
  • Numerical integration
  • Minimization / optimization
  • Statistical / probabilistic calculations
  • Parallelized calculation, managing workflows
  • Web interface
Who Should Attend?
Application engineers, design engineers, research engineers, researchers

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Measure with an Impedance Tube Using 2, 3, 4 Microphones

Course Objectives

  • Acquire the principles of impedance tube measurement
  • Detect the main issues and be able to troubleshoot the measuring chain
  • Be autonomous in selecting the type of measurement for a prescribed material

Training Agenda

Part 1: Introduction
  • Stakes of impedance tube measurement
Part 2: Measure with 2 Microphones
  • Presentation of the standard ISO 10534 (ASTM E1050)
  • Practical recommendations
Part 3: Measure with 3 Microphones
  • Presentation of the method (non-standardized)
  • Practical recommendations
Part 4: Measure with 4 Microphones
  • Presentation of the method (ASTM E2611)
  • Practical recommendations
Part 5: Practicals
  • If possible, experimentations on impedance tube
  • Demonstrations with TubeCell software product
Who Should Attend?
Operating technicians, Process technicians, application engineers, design engineers, research engineers, researchers

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Material Characterization – Acoustic, Elastic and Damping Parameters

Course Objectives

  • Gain the knowledge of the main dissipation mechanisms associated with a porous material and be able to identify an adapted behavioral model
  • Be able to lead an “easy” characterization
  • Identify the issues and the resulting strategy to solve a “difficult” characterization

Training Agenda

Part 1: Introduction
  • Definition and stakes of the characterization
Part 2: Characterization of Acoustic Parameters
  • Review of the main characterization methods of the acoustic parameters (audible and ultrasound frequency range)
  • Presentation of the impedance tube method
  • Practicals on available samples
  • Practical recommendations
  • Demonstration using RoKCell software product
Part 3: Characterization of Elastic and Damping Parameters
  • Reminders on the elastic behavior of porous materials
  • Review of the main characterization methods
  • Presentation of the quasi-static, uni-axial compression method
  • Practicals on available samples
  • Practical recommendations
  • Demonstration using MecaCell software product
Who Should Attend?
Operating technicians, Process technicians, application engineers, design engineers, research engineers, researchers

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Building Acoustic Measurements – In-Lab and In-Suit

Course Objectives

  • Gain knowledge about the main building performance indicators of materials and systems
  • Gain knowledge of the principles of ISO 354 (absorption) and ISO 10140 (insulation) standard series
  • Gain autonomy in the selection of the appropriate test method and indicator for a prescribed material and system

Training Agenda

Part 1: Introduction
  • Basic reminders in building acoustics
  • Reminders about the regulation
Part 2: Measurement for Sound Correction
  • Presentation of the ISO 354 standard
  • Absorption single rating values
  • Practical recommendations and demos using BatCell software product
Part 3: Measurement for Sound Insulation
  • Presentation of the ISO 10140-2 standard: air-borne sound insulation
  • Presentation of the ISO 10140-3 standard: impact sound attenuation
  • Single rating values for the sound insulation
  • Practical recommendations and demos using BatCell software product
Part 4: Complementary Measurements
  • Characterization of appliances: air inlet, noisy installations, ect...
  • Characterization of materials
  • Measurement of noise and exterior appliances: traffic noise, noise barriers, road surfaces, ect...
Who Should Attend?
Technical sales, operating technicians, Process technicians, application engineers, design engineers, research engineers, researchers

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Please note that on-site training is currently offered for Europe, USA, Canada, China, Brazil, Japan and India. All other countries will have virtual trainings.

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