Telex ANR TM 500 - Manual (Page 3)

Gen eral De scrip tion
The Telex Airman ANR™500 Active Noise Reduction headset combines design
features of a lightweight headset with the advanced techniques of electronic noise
reduction. The result is a comfortable light-weight headset that provides good
electronic reduction of low frequency ambient noise, while the cushion design provides
good passive reduction of high frequency ambient noise. To take advantage of this
improved listening environment, the Airman ANR™500 also features extended
response receivers for improved reproduction not only of radio communications, but
also of stereo music played back over the aircraft entertainment system.
The headset comes in a fixed-wing version for use in aircraft with medium to low noise
levels. This version can be plugged into an aircraft radio for standard monaural
communications or into an intercom system wired for stereo entertainment.
The Air man ANR™ 500 head set is ap proved for air craft use un der FAA TSO’s
C57a and C58a.
De sign Fea tures (see Fig ure 1)
Fitting and Com fort:
An adjustable ratcheted headband allows the wearer to make quick and easy
adjustments to fit a wide range of head sizes, while the gimbal mounted earcups
improve the headset comfort.
Con trol Mod ule:
The power on/off switch and the stereo/mono switch are both located on the control
module. The control module can be clipped to a shirt collar or pocket, using the
clothing clip.
Boom Mi cro phone:
A flexible gooseneck boom permits precise microphone placement. The boom rotates
120° to use the microphone on either side of the head. The microphone cartridge
features a noise-canceling electret element. The microphone amplifier is built into the
headset and operates on power supplied by the aircraft radio.
The mi cro phone am pli fier has an ad just able gain con trol to pro vide an out put level
equiv a lent to car bon mi cro phone lev els. (Ad just ment by a qual i fied avi on ics tech ni cian
is rec om mended.)
Cord age and Plugs:
The mi cro phone cord age is pro tected in side the boom arm. Shielded wire through out
the head set pro tects against RFI and EMI. Strain re liefs on all cords pro vide max i mum
du ra bil ity.
2