Multitalker® Head Related Transfer Function (Hrtf); Audio Location - PS Engineering PAC45J Pilot's Manual And Operation Manual

Pilot Com Swap (P453 pin 25) switch is available if all eight transceivers
are present and configured. If less than eight comms then pilot comm swap
is not possible.
Receiver Activity Indication (-RXI)
PAC45J systems have a Receive Activity Indicator that flashes the selected
receiver indicator when a signal is present on that receiver. This allows the
user to spot an active radio, even if the volume is turned down. This func-
tion is set at the installation.
MultiTalker® Head Related Transfer Function (HRTF) (5)
Communication receiver audio signals are presented to the DSP and pro-
cessed to "appear" in a different location to the crew. "MultiTalker" (US
Patent #7,391,877) specifies up to nine locations. This helps the crew to
better comprehend speech by locating it in a manner more easily differenti-
ated by the human brain.
Intercom and other audio is not spatially processed, only the
eight communications transceivers.
You must have a stereo installation, using stereo headsets,
in stereo mode for this feature.
MultiTalker® places the communi-
cations receiver audio in one of nine
apparent locations in the crew's
headset. This has been scientifically
shown to allow the brain to focus on
multiple conversations and improve
comprehension for the listener.
Pressing the HRTF button toggles
the PAC45J MultiTalker spatial
function on (receiver sources distrib-
uted) or off (receiver audio sources
neutral). The HRTF button on the
pilot and copilot panels control the
function for the user of that panel.

Audio Location

This adjustment allows the eight Spatial Audio inputs to be "relocated" on
any of nine (9) pre-defined "Head Related Transfer Function" (HTRF) lo-
cations.
The pilot panel can control the locations for the eight receive audio loca-
tions for all users. Press and hold the HRTF button for > 1 second on the
pilot's panel until the HRTF button and all COM nomenclature start blink-
ing green.
Rotate the desired COM receive volume knob so the pointer indicates the
approximate location of the desired location. A voice announcement will
Page 4 202-045-2200 Oct. 2021 PAC45J Pilot Guide