History

Acoustic Spaces Extension

describing properties of acoustic rooms, as needed by renderers who model spaces.

  • Room size
  • Room shape
  • Material/damping of walls
    o frequency dependent
    o Units: % Absorptions
    o diffusion
  • Environmental variables
    o Humidity
    o Temperature

Reviews

Master thesis by Karin Münnich, chapter 3. p. 41 [1]

  • Room Presence: energy of the early reflections in percentage to direct sound
  • Running Reverb: early decay rate of the late reverb
  • Envelopment: energy of the late reverb in percentage to direct sound
  • LateReverb: general decay rate of the late reverb
  • Heaviness: energy of the LF-component of the late reverb
    • Frequency: x-frequency between LF and Mids
  • Liveness: energy of the HF-component of the late reverb
    • Frequency: x-frequency between Mids and HF

The proposed parameter for a scene description format base mainly on the MPEG-4 specification [2], chapter 9.4.2.83.
Also IRCAM's Spatialisateur uses these 6 parameters.

References

[1] Münnich, K. Untersuchung und Implementierung von Speicher- und Übertragungsformaten für Mischwerkzeuge der Klangfeldsynthese. Master’s thesis, 2003, Technische Universität Ilmenau.
[2] ISO/IEC. ISO/IEC 14496-1:2002. Information Technology - Coding of audiovisual objects - Part 1: Systems. 2002.