For the determination of the airflow resistance of components, a specific specimen holder was developed with pneumatic elevation system and laser light grid for safety at work. The provided fluidic leak-proof assembly of the specimens allows the reliable measurement of the pressure loss in the range of 5 Pa to 3750 Pa at an airflow of 0,5 l/min to 100 l/min.
To model and optimize complex physical procedures, the Gesellschaft für Akustikforschung Dresden mbH
successfully applies the numerical calculation software COMSOL Multiphysics® of the company COMSOL Multiphysics GmbH. The software is based on the finite element method and can be used in numerous specific areas. Furthermore, the combination of specific analysis modules allows the interaction of various physical mechanisms.
The finite element method (FEM) belongs to the best known numerical calculation methods and can be applied to the modeling of a wide range of complex physical processes. This includes the vibrational and resonance behaviour of structures (e.g. bars, plates), the propagation of sound and flows in solid, fluent and gaseous media (e.g. in mufflers), the distributions of temperature and mechanical stress in structures etc.
Erweiterung des Sortiments von AFD 1000 - AcoustiTube® durch Durchmesser 15 mm ermöglicht messtechnische Bestimmung des spektralen Schallabsorptionsgrads nach DIN EN ISO 10534-2 (ISO 10534-2) über weiten Frequenzbereich von 50 Hz bis 10000 Hz.
The description of the sound field over impedance surfaces (grounds, road surfaces etc.) in the surrounding area of obstacles (sound-reflecting, absorbing and / or diffuse reflecting acoustic screens, walls etc.) requires consideration of different effects. Modeling the emission sound source to be examined (location, strength, directional characteristic) is important as well. (see Publications 2007 and 2008)
For the determination of the airflow resistance of components, a specific specimen holder was developed with pneumatic elevation system and laser light grid for safety at work. The provided fluidic leak-proof assembly of the specimens allows the reliable measurement of the pressure loss in the range of 5 Pa to 3750 Pa at an airflow of 0,5 l/min to 100 l/min.
To model and optimize complex physical procedures, the Gesellschaft für Akustikforschung Dresden mbH
successfully applies the numerical calculation software COMSOL Multiphysics® of the company COMSOL Multiphysics GmbH. The software is based on the finite element method and can be used in numerous specific areas. Furthermore, the combination of specific analysis modules allows the interaction of various physical mechanisms.
The finite element method (FEM) belongs to the best known numerical calculation methods and can be applied to the modeling of a wide range of complex physical processes. This includes the vibrational and resonance behaviour of structures (e.g. bars, plates), the propagation of sound and flows in solid, fluent and gaseous media (e.g. in mufflers), the distributions of temperature and mechanical stress in structures etc.
Erweiterung des Sortiments von AFD 1000 - AcoustiTube® durch Durchmesser 15 mm ermöglicht messtechnische Bestimmung des spektralen Schallabsorptionsgrads nach DIN EN ISO 10534-2 (ISO 10534-2) über weiten Frequenzbereich von 50 Hz bis 10000 Hz.
The description of the sound field over impedance surfaces (grounds, road surfaces etc.) in the surrounding area of obstacles (sound-reflecting, absorbing and / or diffuse reflecting acoustic screens, walls etc.) requires consideration of different effects. Modeling the emission sound source to be examined (location, strength, directional characteristic) is important as well.