Flightcom FH Series Manual page 4

Intercom Communication
The FH701, 702, 703 and the UH701, 702 headsets have a yellow PTT button on the ear
dome. Press and release this button to activate the microphone for intercom communication.
Press and release the button again to turn the microphone off.
The FH704 headset has a red momentary PTT button on the ear dome. Press and hold
this button to activate the microphone for intercom communication. Release the button
to turn the microphone off.
Caution
This Flightcom headset provides 24dB noise attenuation when properly fitted to the user
and worn as instructed. Any modification to the hearing protector such as drilling holes in
the dome, painting or reforming the headband spring, will negatively impact the hearing
protector's performance and hearing damage could occur.
Federal law requires the following statements:
"Although hearing protectors can be recommended for protection against the harmful
effects of impulsive noise, the Noise Reduction Rating (NRR) is based on the attenuation
of continuous noise and may not be an accurate indicator of the protection attainable
against impulsive noise such as gunfire."
"The level of noise entering a person's ear, when a hearing protector is worn as directed,
is closely approximated by the difference between the A - weighted environmental noise
level and the NRR.
EXAMPLE: 1. The environmental noise level as measured at the ear is 92dBA.
2. The NRR is 24dB.
3. The level of noise entering the ear is approximately equal to 92dB (A) - NRR.
CAUTION: For noise environments dominated by frequencies below 500 Hz the
C - weighted environmental noise level should be used."
Always wear a hearing protector in areas that have been identified as high noise locations.
Care & Maintenance
Repairs or replacement of the headset should be immediately sought if you see any defect
such as holes or cracks in the ear domes, ear seals or headband.
Body oils, perspiration and hair care products will, over time, affect the ear seals. Inspect
the ear seals frequently for signs of wear and replace at approximate 6 month intervals
along with the mic muff (cover).
Do not remove the foam speaker cover.
Never remove the headset from the aircraft jack by pulling on the cord. The
headset should be unplugged at the jack location by pulling the headphone plug
from the jack.