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HMEC 45 NoiseGard™
Headsets | Pilot´s Headset with NoiseGard™
Active Noise Compensation
General Description
The HMEC 45 is a very lightweight and comfortable open pilot’s head-
set (boomset) with NoiseGard™ active noise compensation. Different
connector and powering versions are available to suit every conceivable
cockpit configuration.
Features
Noise reduction of approx. 10 dB – consequently ATC signal can
be decreased
Lightweight, with soft ear pads
Two-piece adjustable headband ensures a secure fit
Boom microphone with noise-compensated electret capsule
Adjustable microphone boom can be turned through 350° and
thus be worn on either side
FAA and JAA TSO approval C 57 a and C 58 a
Delivery includes: 1 HMEC 45 headset, 1 MZW 45 windshield
1 MZQ 2002-1 cable clip
Recommended Accessories
HZH 60 hygiene pads (100 pairs) Cat. No. 003553
HZP 45 comfort hygiene pads Cat. No. 091592
Replacement Parts
Ear pads(1 pair) Cat. No. 046581
MZW 45 windshield Cat. No. 075823
Technical Data
Headphones
Transducer principle..............................................................dynamic
Ear coupling...........................................................supra-aural, open
Frequency response.................................................20 – 18,000 Hz
Impedance active/passive...............600 Ω/160 Ω (2 x 1,200 Ω/
2 x 320 Ω connected in parallel)
Nominal SPL.........................................................102 dB/SPL ± 3 dB
(1 kHz, 1 mW)...............................................(as per RTCA/DO 214)
Active noise compensation.........................10 dB ± 3 dB between
400 Hz and 1 kHz
NRR (Noise Reduction Rating)................................................ 11 dB
THD................................................................................................< 1 %
Contact pressure...........................................................approx. 1.6 N
Weight without cable............................................................... 140 g
Microphone incl. Preamplifier
Type....................................................................................... MKE 45-1
Transducer principle..................back-electret condenser capsule,
noise-compensated
Frequency response.................................................300 – 5,000 Hz
Max. SPL ...................................................................................120 dB
Output voltage........................................400 mV ± 3 dB at 114 dB
(as per RTCA/DO 214)
Terminating impedance .......................................................... 150 Ω
Operating voltage.......................................8 – 16 V DC, 8 – 25 mA
(as per RTCA/DO 214)
General Data
Connection cable............. single-sided round cable, length 1.8 m
NoiseGard™ supply
-CA/-KA...................................................... 2 x 1.5 V AA batteries or
2 x 1.2 V AA rechargeable batteries
-KAX ................................................ 12 – 35 V DC from the aircraft,
via XLR-3 connector
Operating time approx.
-CA/-KA........................................................................ Batteries: 80 h
Rechargeable batt.: 20 h
Switch -CA/-KA ...................................Battery/NoiseGard™ on/off
Indicator -CA/-KA...................................... green LED for Power On
Connector(s)
-CA ...............................................................................................XLR-5
-KA
Headphones..................................... 1/4” stereo jack (6.3 mm Ø)
(converted to mono)
Microphone .....................................................PJ-068 (5.25 mm Ø)
-KAX
Headphones..................................... 1/4” stereo jack (6.3 mm Ø)
(converted to mono)
Microphone .....................................................PJ-068 (5.25 mm Ø)
NoiseGard™ supply..................................................................XLR-3
Cat. No. 004498 HMEC 45
Cat. No. 004497 HMEC 45-CA
Cat. No. 004498 HMEC 45-KA
Cat. No. 004649 HMEC 45-KAX