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HRTF
HRTF stands for Head Related Transfer Functions, and it is a
set of audio filters varying locations of sound effects(spatial
hearing cues) in three-dimension measured from the
listener's eardrum.
This technology and special digital signal processing are
used to recreate spatial hearing cues, making our ears hear
realistic and three-dimensional sounds coming from a pairs
of loud speakers or headphones.
When you activate this Demo, you can hear a helicopter fly
around you clockwise for three times.