Verification of
Prediction Based on Randomized Tail-Corrected Cone-Tracing and
Array Modeling
B.-I. Dalenbäck, CATT, 137th ASA/2nd EAA, Berlin,
March 1999
Reverberation time, diffuse reflection, Sabine, and computerized
prediction
Html article
from from 2002/v7.2 but is still useful.
The Chalmers Room Acoustics Group was active in room acoustic prediction and auralization since the early eighties (current activities: http://www.ta.chalmers.se). CATT-Acoustic was developed while the author was a part-time Ph.D. student and member of the group. Published papers and articles cover prediction and auralization methods applied, rather than the software itself, and are in reverse chronological order:
Auralization,
Virtually Everywhere, B.-I. Dalenbäck, 100th AES
Conv.preprint 4228 (1996);
Room Acoustic Prediction Based on a Unified Treatment
of Diffuse and Specular Reflection, B.-I. Dalenbäck, JASA
100 (August 1996);
This article describes
the basic principles of TUCT™ algorithm 2 and 3 in CATT-Acoustic™ v9 with varying degrees of
deterministic diffuse ray split-up but was rewritten from scratch taking
advantage of the much faster mulit-core PCs 15 years later. Major differences
to the method described in the article are: 1) natural reflection growth
is now inherent in the algorithms and the late part energy no longer needs
to be extrapolated, 2) the IRs for auralization are no longer created
from octave-band echograms but are created directly, reflection by reflection,
during prediction (no post-processing necessary). Algorithm 1 (the "work
horse") is
based on the same overall principles but with random specular/diffuse
refections, it can be said to be a more general version of the Randomized
Tail-corrected Cone-tracing (RTC) in v7 and v8 but with reflection-by-reflection
IR creation.
Narrowing the Gap Between Virtual Reality and Auralization,
B.-I. Dalenbäck, D. McGrath, Proc. 15th ICA, 429-432 (1995);
Room Acoustic Prediction and Auralization Based on
a Unified Treatment of Diffuse and Specular Reflection,
B.-I. Dalenbäck, Proc. 15th ICA, 425-428 (1995);
The Importance of Diffuse Reflection in Computerized Room
Acoustic Prediction and Auralization, B.-I. Dalenbäck,
Proc. IOA 17, 24-34 (1995);
A Macroscopic View of Diffuse Reflection, B.-I. Dalenbäck,
M. Kleiner, P. Svensson, JAES 42, 793-807 (1994);
The Audibility
of Changes in Geometric Shape, Source Directivity, and Absorptive
Treatment - Experiments in Auralization, B.-I. Dalenbäck,
M. Kleiner, P. Svensson, JAES 41(11), 905-913 (1993);
Auralization - an Overview, M. Kleiner, B.-I. Dalenbäck,
P. Svensson, JAES 41(11), 861-875 (1993);
Prediction and Auralization Based on a Combined Image Source/Ray-
Model, B.-I. Dalenbäck, P. Svensson, M. Kleiner, Proc.
14th ICA, F2-7 (1992)
For additional
papers related to the prediction and auralization methods in CATT-Acoustic
and auralization in general see the Download area.