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