Bose Aviation Headset X Руководство пользователя - Страница 32
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Technical Information
32
Sound pressure levels (SPL) are relative to 20 micropascals.
Headphone
Damage could occur to avionics equipment
that is intended for use only with 600-ohm
headsets. If in doubt, consult the avionics
equipment manufacturer.
Impedance
Monaural mode: 160 ohms (ON) and 230
ohms (OFF) at 1 kHz
Stereo mode: 320 ohms (ON), 460 ohms (OFF)
Frequency
15 Hz to 15 kHz
response
Sensitivity: 90 dB SPL typical, measured at
1 mw, 1 kHz, full volume on KEMAR ear
simulator
Microphone
Bias required: 8 to 16 VDC through 220 to
(Electret)
2200 ohms
Sensitivity: Varies depending upon bias and
radio AC input impedance. Typical output is
300 mV at 114 dB SPL. To assure proper mod-
ulation of the radio, it is recommended that an
avionics technician adjust its input to match
the output of the microphone.
Microphone
Impedance: 5 ohms
(Dynamic)
Sensitivity: Equivalent to M-87/M-101
Maximum ambi-
115 dBC and 105 dBA SPL
ent noise level
Power source
Battery powered: 2 AA alkaline, IEC LR6
Aircraft powered: 10 to 32 VDC
Battery life
Alkaline: Up to 40 hours in typical general
aviation aircraft noise. Battery life varies with
ambient noise level, temperature, ear cushion
condition and age of batteries.
Current
Operating: 25 ma in typical aircraft noise
Fuse/breaker
1
/
4
recommended
1
/
2
AM270261_00 V.pdf May 16 2003
-amp, fast-blow fuse (AGC
-amp circuit breaker
1
/
-amp fuse) or
4