FFT: Solution Brief - ActranTM
SOLUTION BRIEF
Optimizing Sound Quality in Consumer Electronic Devices
Improve Design and Sound Performance
Sound Quality Improvement for Audio Devices
Key Software Features
Numerical acoustics simulation is helping product
engineers to improve sound quality
for many audio device applications
•Acoustic Finite Elements for cavity
and exterior acoustics modeling
•Loudspeakers
•Microphones
•Headsets
•Televisions
•Cell Phones
•Car Sound Packages
•Hearing-Aid Devices
Actran Simulates Audio Device Acoustic
Performance with Accuracy
•Rich library of components:
•Acoustic
•Visco-elastic
•Porous material
•Membrane
•Visco-thermal acoustic damping
•Piezo-electric
•Exterior sound radiation by Infinite Elements
or Adaptive Perfectly Matched Layers (APML)
•3D and 2D axi-symmetric modeling
•Rich post-processing: color maps,
frequency response curves, sound
directivity, directional microphones,
animations, etc.
•Acoustic Infinite Elements or Adaptive
Perfectly Match Layers (APML) for modeling
the far field anechoic condition
• Full structure element library: solids, shells,
membranes, beams, springs, rigid connections, etc.
• Dissipation mechanisms such as viscothermal losses, acoustic absorption...
• Poro-elastic element library based on the
BIOT theory for modeling bulk reacting
materials
• Piezo-electric element libraries for
modeling active structures
• Full support of non-congruent meshes
• Use vibration results from most FEA
structural analysis solvers for acoustic
radiation modeling
• Plane, spherical and cylindrical wave
sources
•Acoustic pressure, velocity and admittance
boundary conditions
• Mechanical and kinematic excitations
• Fast direct and iterative solvers for reduced
CPU times
• MUMPS and Krylov solvers for fast
frequency response analysis
• Rich post-processing capabilities: frequency
response plots, maps, sound directivity,
directive microphones, animations and
more...
FFT: Solution Brief - ActranTM
SOLUTION BRIEF
Case Study: Loudspeaker Simulation with Actran
Actran Software Suite
Actran model of a transmission line box
loudspeaker
• A loudspeaker and enclosure model shows
the vibration of the diaphragm, the acoustic
propagation through the transmission line, and
the resulting sound field due to radiation from
both the diaphragm and the transmission line exit
• Actran is used for the design of the transmission
line enclosure
Air (inside and surrounding
the loudspeaker)
Microphones
Actran is a complete acoustic, vibroacoustic and aero-acoustic CAE software suite. Empowered by the technologies of finite/infinite element methods
(FE/IFE), as well as the Discontinuous
Galerkin Method (DGM), Actran provides
a rich library of materials, elements,
boundary conditions, solution schemes
and solvers. Actran is a high accuracy,
high performance and high productivity
modeling tool suiting the needs of the
most demanding engineers, researchers,
teachers and students for solving the
most challenging acoustic problems.
Free Field Technologies (FFT)
Cone
Voice coil
Suspension
Transmission line box
Case Study: Microphone Simulation with Actran
Actran can be used to model frequency response
and directivity of a microphone
•The model shows that exterior sound waves
propagate towards the microphone, producing the
vibration of the microphone diaphragm.
Free Field Technologies is focused
on three main areas:
•Developing Actran software for acoustic, aero-acoustic and vibro-acoustic
simulation;
•Providing technical services, support, training and delivering acoustic
engineering projects;
•Researching innovative technologies
and methods of acoustic analysis in
order to remain the leader in acoustic
modeling.
Free Field Technologies has more
than 250 customers around the
world active in the Automotive,
Aerospace, Shipbuilding,
Electronic and Heavy Equipment
industries as well as in the
Educational and Research sectors.
•Actran can include all necessary materials to
accurately model a microphone
•Diaphragm under initial tension
•Porous material (filter, damper)
•Air material including visco-thermal dissipation
FFT is a wholly owned subsidiary
of MSC Software Corporation.
•Actran finite element models can easily be
created and post-processed using the
Actran/VI Graphical user Interface
Corporate
MSC Software Corporation
4675 MacArthur Court
Suite 900
Newport Beach, CA 92660
Telephone 714.540.8900
www.mscsoftware.com
Europe, Middle East,
Africa
MSC Software GmbH
Am Moosfeld 13
81829 Munich, Germany
Telephone 49.89.431.98.70
FREE FIELD TECHNOLOGIES SA (HQ)
Rue Emile Francqui 9
1435 Mont-Saint-Guibert
Belgium
Telephone +32 10 45 12 26
Fax +32 10 45 46 26
www.fft.be
Japan
MSC Software LTD.
Shinjuku First West 8F
23-7 Nishi Shinjuku
1-Chome, Shinjuku-Ku
Tokyo, Japan 160-0023
Telephone 81.3.6911.1200
Asia-Pacific
MSC Software (S) Pte. Ltd.
100 Beach Road
#16-05 Shaw Towers
Singapore 189702
Telephone 65.6272.0082
The MSC Software corporate logo, MSC, and the names of the
MSC Software products and services referenced herein are trademarks
or registered trademarks of the MSC.Software Corporation in the United
States and/or other countries. All other trademarks belong to their
respective owners. © 2014 MSC.Software Corporation. All rights reserved.
ACTRANAUD*2014APR*SB