The PSFC System does not have a direct control for distance.
As a workaround,
we emulate distance function using the available control parameters:
LIVENESS (reflection and reverberation gain),
ROOMSIZE (delay), and VOLUME (source gain).
Figure 2 diagrams the sound level.
Figure 2:
Direct, Reflective, and Reverberant Sound
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The direct sound arrives first at the ear.
Next, the reflective sound comes shortly after.
The time gap is the initial delay.
It is an important cue in a simulated soundscape,
suggesting the size of an indoors space [Bla96].
In the PSFC System, the ROOMSIZE parameter describes the initial delay [Beg94].
kimitaka ishikawa
1998-06-08