21:09 Þ 8:35
ICA 2001, Rome, 4/9/2001
10/32
Rationale of the conversion process
lFirst the discrete early reflections are processed, taking into account their known arrival direction and exact timing.
lFor each discrete arrival, a Dirac’s delta is generated at the exact arrival time,
lthen it is convolved with the impulse response of an octave-band equalizer which imposes the proper SPL value in the 10 octave bands,
land finally it is convolved with the multichannel impulse response of the selected type of microphone, chosen depending on the direction of arrival.
lSecond, the subsequent reverberant tail is added, based on the whole energetic impulse response data (which do not contain any directional information), after subtraction of the energy of the discrete reflections (already processed).
lAn independent sample of white noise for each channel of the virtual microphone is generated
lThe white noise sample is splitted in ten octave-band filtered versions
lEach of them is amplitude-modulated with the square root of the energetic IR in the corresponding octave band
lFinally the wide-band response is obtained simply summing together the ten filtered signals