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.
Summary of Contents for HMEC 45-CA NoiseGard
Page 5: ...Adjusting the headband...