Magne Skålevik, Senior rådgiver
Brekke
& Strand akustikk AS
Postadresse:
Postboks 1024 Hoff, 0218 OSLO
Besøksadresse:
Hovfaret 17B
Sentralbord:
+47 24 12 64 40 | Direkte: +47 41479375
msk@bs-akustikk.no
| www.bs-akustikk.no | www.akutek.info
Abstract: Wallace Sabine introduced the
reverberation time (RT) as a measure of acoustic conditions in rooms a century
ago. After some decades of experience with RT it became evident that two rooms
with similar RT could still be sounding differently. Until today, a large
number of different parameters have been suggested to describe these
differences. In an attempt to settle for a limited number of listener’s
aspects, and a limited number of physical measures associated with each of
them, a set of five aspects have been suggested. In the ISO standard 3382-1,
the RT is not included in the group of physical measures associated with
listener’s aspects. It is tempting to jump to the conclusion that the
reverberation time era has come to an end. However, from statistical analysis
of measurements and computer simulations, and from Barron’s Revised Theory it
can be shown that RT is the underlying acoustical parameter governing 4 out of
the 5 listener’s aspects included in ISO 3382-1. Besides, if any acoustician where
allowed to ask for only one single number in order to obtain information about
the acoustics of a concert hall, it would most certainly be the mid-frequency
RT.