RPG® Diffusor Systems is now a dealer for CATT-Acoustic room acoustics prediction and auralization software. RPG® is working with CATT towards the ultimate goal of including measured and predicted scattering coefficients for all RPG® diffusors into future versions of the sofware.
For detailed information, or to download a demonstration copy, visit CATT-Acoustic’s web site at www.catt.se.
Room Acoustics Prediction
Room acoustics prediction, in general, is the process where, using geometrical acoustics, octave-band echograms are predicted based on a 3D CAD model of a room. Frequency dependent material properties (absorption, diffusion) are assigned to room surfaces and frequency dependent source directivities are assigned to sound sources. From these echograms a great number of numerical measures of e.g. speech intelligibility, and reverberation time can be estimated.
Auralization
Auralization (auralisation, Eng.), in general, is the process where predicted octave-band echograms are converted to binaural impulse responses that can be convolved with anechoically recorded music or speech giving an impression of how the music or the speech would sound if replayed in the modeled hall. The process involves digital signal processing and Head-Related Transfer Functions (HRTFs). In addition to binaural responses directive microphone, stereo, and B-format responses are possible. Convolution with anechoic material is made either directly in software or via special hardware.
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