Import 3D files
Import 3D files with common extensions: 3DS (3D Studio), STL (stereolithography), PLY (Stanford) and POLY (TetGen).
I-Simpa features
Note that the following features are built-in features of the current release, and correspond to a standard use of ‘classical’ numerical codes of sound propagation based, for example, on ray-tracing approaches. Features can be adding using Python™ scripts.
Geometry
Parallelepipedic geometry
Built-in design of parallelepipedic model. Just gives the dimensions of the scene.
Geometry correction
Automatic tools for model corrections and repairs during file importation. Model detection error.
Geometry approximation
Algorithm for model approximation by the marching cube method. This can be useful for original 3D scene with many problems.
Surface material
Import data material
Import data from file (import from CATT-Acoustic™ and Odeon room acoustics software).
Reference and User material database
Use the built-in database (Reference) or create your own materials (User database). Organize and copy material between (sub-)groups of material.
Material properties
Define acoustic parameters by frequency band: absorption, transmission loss, scattering, scattering reflection law. Add material information (description, physical parameters...).
Sound sources
Reference and User spectrum database
Use the built-in database (Reference) or create your own source spectrum (User database).
Sources properties
Define source properties: spectrum, position, directivity, delay, activate/desactivate sources.
Sources manipulation
Organize and copy sources between (sub-)groups of material. Translation and rotation of (sub-)groups of sound sources.
Acoustic receivers
Punctual sound sources
Defines source properties: position, directivity, orientation to a point or (with a dynamic link) to a source, background noise.
Receivers manipulation
Organize and copy receivers between (sub-)groups of material. Translation and rotation of (sub-)groups of receivers.
Surface receivers
Definition of a surface receiver by selecting surfaces of the 3D model or by creating cut planes.
Acoustics calculation
Calculation code
Built-in acoustic calculation code: sound particle tracing (SPPS); Classical theory of reverberation for room acoustics (TCR).
Sound map
Noisemap (surface receivers) in stationary stationary state, time-varying state, time-cumulated state. Iso-contours.
Acoustics parameters
EN ISO 3382-1 room acoustics parameters: Reverberation times, Clarity, Definition, Early support, Centre time, Strength, Early Lateral Energy Fraction, Late Lateral Sound Level.
Animation
Intensity vectors animation for punctual receivers. Ray-tracing and particle-tracing animation.
Impulse response calculation
Echogram and Schroeder integration curves.
Other features
Python™ scripting
Extension of I-Simpa functionalities using Python scripts. Creations of Toolbox.
Environmental data
Definition of atmospheric conditions and
calculation of absorption coefficient (ISO 9613). Meteorological parameters (log-lin sound speed velocity profiles).
Tetrahedric meshing
Built-in Delaunay tetrahedric meshing using TetGen code (fully parametrized).
Visualization
OpenGL® support with several modes for viewing and camera. Graphical visualization and image exports. Dockable interface.
Multi-monitors viewing.
Fitting zone
Definition of volumes with fitting objects characterized by probabilistic parameters (mean free path, absorption, diffusion law).