Room Acoustics: 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 (from CATT-Acoustic v9 the impulse response used for
auralization is however created on the fly without going via energy echograms). 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 for stereo, surround or Ambisonic replay. Convolution
with anechoic material is made either directly in software or via
special hardware (from CATT-Acoustic v9 direct
auarlization only requires clicking a button). In addition real time
walkthrough visualization and auralization is possible via CATT-Walker™ and creation of auralized
soundtracks to rendered videos via the Walkthrough convolver
and WalkDecim. The basic technique applied
in auralization can also be used to create natural sounding FIR
reverberation as is offered by The FIReverb Suite™
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