TY - JOUR
N2 - This paper discusses the concept of the reverberation radius, also known as critical distance, in rooms with non-uniformly distributed sound absorption. The reverberation radius is the distance from a sound source at which the direct sound level equals the reflected sound level. The currently used formulas to calculate the reverberation radius have been derived by the classic theories of Sabine or Eyring. However, these theories are only valid in perfectly diffused sound fields; thus, only when the energy density is constant throughout a room. Nevertheless, the generally used formulas for the reverberation radius have been used in any circumstance. Starting from theories for determining the reverberation time in non- diffuse sound fields, this paper firstly proposes a new formula to calculate the reverberation radius in rooms with non-uniformly distributed sound absorption. Then, a comparison between the classic formulas and the new one is performed in some rectangular rooms with non-uniformly distributed sound absorption. Finally, this paper introduces a new interpretation of the reverberation radius in non-diffuse sound fields. According to this interpretation, the time corresponding to the sound to travel a reverberation radius should be assumed as the lower limit of integration of the diffuse sound energy
L1 - http://journals.pan.pl/Content/101365/PDF/05_paper.pdf
L2 - http://journals.pan.pl/Content/101365
PY - 2015
IS - No 1
EP - 33-40
KW - reverberation radius
KW - critical distance
KW - non-diffuse sound field
KW - sound energy
KW - revised sound decay theory
A1 - Arau-Puchades, Higini
A1 - Berardi, Umberto
PB - Committee on Acoustics PAS, PAS Institute of Fundamental Technological Research, Polish Acoustical Society
VL - vol. 40
SP - 33-40
T1 - A Revised Sound Energy Theory Based on a New Formula for the Reverberation Radius in Rooms with Non-Diffuse Sound Field
DA - 2015[2015.01.01 AD - 2015.12.31 AD]
UR - http://journals.pan.pl/dlibra/publication/edition/101365
T2 - Archives of Acoustics
DOI - 10.1515/aoa-2015-0005
ER -