ODEON's calculation methods

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Ray tracing and hybrid methods

Simulations in the Odeon software are based on hybrid methods combining ray tracing, image source modelling, and secondary source modelling. The video describes how ray tracing works and has been improved with vector based scattering; how the image source method works and can create a reflectogram; and how the hybrid method combines ray tracing and secondary source modelling for late reflections. Finally, is shown how particle tracing works as an extension of raytracing as an efficient tool to estimate the reverberation time in a room.

0:00​ Intro
0:32​ Ray tracing
0:59​ Image sources for early reflections
1:59​ Secondary sources for late reflections
3:18​ Decay curves
3:46​ Hybrid methods
4:19​ Reflection models
4:50​ Vector-based scattering
5:56​ Particle tracing
6:22​ Global decay and reverberation
6:58​ Reflection paths distribution
7:10​ ODEON development history

Reflection-based Scattering method

Researched and developed specifically for application in ODEON, the reflection-based scattering method allows to calculate scattering not only due to surface roughness via the scattering coefficient, but also takes into account other factors: diffraction due to surface dimensions, angle of incidence, distance to surface edges, and incident path length.

0:00​ Intro
0:10​ Scattering in acoustics software
0:38​ Reflection-based scattering
1:04​ Scattering due to roughness vs. diffraction
1:46​ Effect of different surface sizes
2:13​ Outro

Acoustic measurements with the sine sweep method

Learn about this robust method for room acoustic measurements.

0:00 Room acoustic measurements
0:44 Impulse, or Dirac signal
1:12 Impulse response
2:26 Problems with impulse stimuli
3:36 Sine sweep
4:35 Processing of recorded sweep
5:02 Summary