Sennheiser HMEC 45-CA NoiseGard, Instructions For Use Manual

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Technical data NoiseGard
® HMec 45-KA / -CA
Headphone
Transducer principle dynamic, open
Frequency response 20 Hz - 18 kHz
Impedance active 600
Ω
(mono) 1.2 k
Ω
per side (stereo)
passive 160
Ω
(mono) 320
Ω
per side (stereo)
same volume for active and passive
THD < 1 %
Active compensation 10 dB
±
3 dB between 400 Hz and 1 kHz
Mikrophone incl. preamplifier
Transducer principle Noise-cancelling back-electret condenser
microphone capsule
Frequency response
(2 cm distance between mic
and corner of mouth)
300 Hz - 5 kHz
Max. sound pressure level 120 dB (THD 1 %)
Output voltage 400 mV
±
3 dB at 114 dB SPL
(as per RTCA/DO-214)
Terminating impedance 150
Ω
Operating voltage 8 - 16 V DC, 8 - 25 mA
connections as per RTCA/DO-214
General Data
Contact pressure approx. 1.6 N
Weight without cable 140 g
Cable single-sided, total length 1.8 m
Connectors HMEC45-KA headphone: PJ-055, 6.3 mm (1/4")
microphone: PJ-068, 5.25 mm
HMEC45-CA XLR-5
Power supply 2 x 1.5 V AA type alkaline-manganese batteries
or 2 x 1.2 V AA type rechargeable batteries,
600 mAh
Operating time batteries: approx. 80 hrs
rechargeable batteries: approx. 20 hrs
Display green LED for indicating battery
and noise compensation status
Supply schedule 1 HMEC 45-KA or HMEC 45-CA
Subject to alterations.