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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