Enhanced
Voice Intelligibility (EVI)
The Independence headset has incorporated into its integrated circuitry a proprietary DSP
circuit which enhances all audio within the speech frequencies. The result is more
intelligible incoming ATC transmissions. Incoming speech frequencies are amplified 2-4 dB
for more clarity and intelligibility. This is particular favorable for pilots who may have
suffered some hearing loss over the years.
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Modular
Flexible Design
The PA 17-79T’s modularity includes some unique features. Pilot has designed the
Independence headset to be modular with the introduction of a detachable comm-cord and
microphone boom. This modularity makes the unit “field repairable”. Pilots
can use the headset without the comm-cord when they are doing their preflight around the
aircraft. The detachable comm-cord enables the user to use the headset in different
applications by simply purchasing the appropriate comm-cord. Industrial users can wear a
modified version with or without a microphone and protect their hearing as well as have
the flexibility to walk around without worrying about a power source. The user can adjust
the microphone boom from left to right by plugging into the 3.5 mm jack on either the left
or right ear cup. One can remove the microphone boom by fully extending the headband
to its largest size so approximately only ¾” of the headband is passing through the
rubber bushing located in the center of the ear cup. Then grasp the tip of the headband
and slowly pull/twist the headband through the rubber bushing. To reattach, line up the
molded rubber pieces and headband and snap the rubber molded piece back onto the pivot.
Comfort
Features
The headset is fitted with a breathable sheepskin headpad which is attached to the
headband with a Velcroâ
closure. This headpad virtually eliminates all complaints of hat spots caused by
non-breathable synthetic headpads used by other manufacturers. The natural headpad
combined with the wide single pivot suspension of the headband
assures a comfortable fit. The foam ear seals are extra soft and
generously proportioned and fit around the ear to distribute
pressure. Silicone gel ear seals are now standard on the
headset.
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On/Off – DNC
Activation
The Independence headset has a black waterproof cover over the push button On/Off switch
on the right shoulder of the ear cup which has the comm-cord jack. To turn the unit on,
push the button all the way down till it clicks. There is a green LED light located @1
inch to the upper left of the On/Off button that will illuminate when the unit is turned
on. To turn the unit off, press the button again. When not wearing the headset, one can
visually see if the headset is turned on by viewing the green LED power indicator. The 1779T also now has an automatic shutoff feature.
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Mono/Stereo
Selector Switch Individual Ear Cup Volume Adjustments
The Independence DNC headset can be used in either monaural or stereo modes. A selector
switch (M/S) and individual right and left ear cup volume adjustments are placed
conveniently on the comm-cord for easy access. Each ear cup’s audio volume can be
individually adjusted in either mono or stereo mode. This allows users who may have
suffered previous hearing loss in one ear to have perfect audio adjustment in both ears.
This is for General Aviation 1779's, the Helicopter version
comes with single volume control and no stereo capability.
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Rechargeable
Battery, Power Jack and Charger
The PA 17-79T is totally self-contained and requires no external power. One has the
independence of not having to choose whether one wants a portable or a panel mounted
version as with other ANR headsets. A rechargeable nickel metal hydride
(NiMH) battery
pack is installed inside the ear cup. This type of battery has no “memory
effect” as with other rechargeable NiCAD batteries. There are two 3.5mm jacks for
charging the battery. They are located on each ear cup directly below the overhead cord
where it enters the cup. These jacks serve a dual purpose and can also be used to plug in
the microphone. The unit has been designed so when the NiMH battery’s power
gets down to 7V, the LED light will not illuminate even though the headset’s active
noise canceling may work for another 45-50 minutes.
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