Comparative Visualization for Wave-based and Geometric Acoustics Eduard Deines 1 , Martin Bertram 3 , Jan Mohring 4 , Jevgenij Jegorovs 4 , Frank Michel 1 , Hans Hagen 2 , and Gregory M. Nielson 5 1 IRTG Kaiserslautern 2 University of Kaiserslautern 3 DFKI Kaiserslautern 4 ITWM Kaiserslautern 5 Arizona State University
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Comparative Visualization for Wave-based and Geometric Acoustics
Comparative Visualization for Wave-based and Geometric Acoustics. Eduard Deines 1 , Martin Bertram 3 , Jan Mohring 4 , Jevgenij Jegorovs 4 , Frank Michel 1 , Hans Hagen 2 , and Gregory M. Nielson 5. 4 ITWM Kaiserslautern 5 Arizona State University. 1 IRTG Kaiserslautern - PowerPoint PPT Presentation
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Comparative Visualization for Wave-based and Geometric AcousticsEduard Deines1, Martin Bertram3, Jan Mohring4, Jevgenij Jegorovs4, Frank Michel1, Hans Hagen2, and Gregory M. Nielson5
1IRTG Kaiserslautern2University of Kaiserslautern3DFKI Kaiserslautern
4ITWM Kaiserslautern5Arizona State University
Comparative Visualization for Wave-based and Geometric Acoustics
• Comparison approach• Interference pattern visualization• Gain visualization
Comparative Visualization for Wave-based and Geometric Acoustics
7Modified Phonon Tracing
• Modeling linear pressure attenuation by Gaussian basis functions dilated proportional with traversed distance => approximates partition of unity for the basis functions
• Tracing pressure rather then energy => better comparison with FEM
Comparative Visualization for Wave-based and Geometric Acoustics
8Phonon Emission
• For each phonon:• Pressure spectrum• Virtual source• Phonon’s current
position
• One emmission, multiple collection passes for different listeners
Comparative Visualization for Wave-based and Geometric Acoustics
9Phonon Emission
• Reflection at scene elements• Update virtual source• Multiply pressure by
• Re-use path by next phonons• Record phonons on scene
elements
• Emission according to source distribution
Comparative Visualization for Wave-based and Geometric Acoustics
10Phonon Collection
• For each visible phonon:• Add unit pulse translated by
distance• Scaling decreases with:
Accumulated length Wall absorption
• Scaling depends on: Phonon outgoing direction Direction from virtual source to
listener position
Comparative Visualization for Wave-based and Geometric Acoustics
11Phonon Collection
• Scaling depends on:• Reference pressure at 1m from
source• Gaussian weighting function
• split unit pulse into frequency bands
Comparative Visualization for Wave-based and Geometric Acoustics