Conference_programme: 18.6 - Acoustics of reverberation chambers
Lecture: Investigations on the Directional Energy Decay Curves in Reverberation Rooms
Author(s): Berzborn Marco, Vorländer Michael
Summary:
The random incidence absorption coefficient is measured according to the international standard ISO-354 in a reverberation room with the prerequisite of the sound field in the room being diffuse. However, numerous studies showed high uncertainties in the method and a poor inter-laboratory reproducibility of the results. The assumption was drawn that these problems are in part caused by the violation of the diffuseness requirement. A robust metric for the diffuseness of sound fields in reverberation rooms is currently lacking, proving the characterization and calibration of reverberation rooms a complex problem.\nTo investigate the diffuseness of sound fields in reverberation rooms this study discusses the analysis of directional room impulse responses (DRIRs) and the spatial deviation of the corresponding directional energy decay curves. Applying spherical array processing methods, the DRIRs are calculated based on the decomposition of the sound field into plane waves composing the sound field. Multiple configurations of a reverberation room with varying degrees of sound field diffuseness are examined based on simulated spherical microphone array measurements.
Corresponding author
Name: Mr Marco Berzborn
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: Germany
