ODEON's calculation methods

Ray tracing and hybrid methods

ODEON simulates acoustics by combining customized versions of classical methods, such as ray tracing and the image source method. It identifies different types of reflections, such as early vs. late and specular vs. scattered, and based on this classification, different methods are applied.

0:00 Intro
0:25 Energy histogram
1:07 Early vs. late reflections
1:54 Image source method
4:07 Image source visibility check
6:16 Early scattering method
8:42 Ray radiosity
11:20 Reflectogram and diffraction paths
12:18 Particle tracing and global estimate
13:40 Limitations of energy-based methods
15:13 Outro

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
0:16 Specular reflection vs scattering
1:10 Causes of scattering
2:24 Scattering due to surface roughness
3:30 Calculation of scattering
4:39 Visual examples of scattering
6:16 Modeling curved surfaces (domes)
7:08 Disabling reflection-based scattering
7:41 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

Theory of binaural auralisation

Learn about the mathematical principles behind binaural auralisation. 

0:00 Intro
1:19 Room impulse response
2:35 Binaural audio
3:06 Binaural impulse responses
4:32 Anechoic recordings
5:04 Convolution
6:49 Listening with headphones
7:29 Outro