Pilot's headset
with NoiseGard® active noise compensation
HMEC 45-CA/KA

Profile

The HMEC 45-CA/KA is an open headset (boomset) with active noise compensation for mobile use in all jet cockpits. It is connected directly into the aircraft's internal power supply. The active noise compensation is powered via a battery pack.

Features

Noise reduction of approx. 10 dB - consequently ATC signal can be decreased

Low weight

Two-piece adjustable headband ensures a secure fit

Robust

Very comfortable ear pads

Boom microphone with noise-compensated electret capsule

Adjustable microphone boom can be turned through 350° and thus be worn on either side

Supply schedule: 1 HMEC 45-CA or HMEC 45-KA

Technical Data - Headphone

Transducer principle	dynamic, open
Ear coupling	supra-aural
Frequency response	20 - 18,000 Hz
Nominal impedance	active 600 ohms passive 150 ohms
Active noise compensation	10 dB +/- 3 dB between 400 Hz and 1 kHz
THD	< 1 %
Contact pressure	approx. 1.6 N
Weight (without cable)	approx. 140 g

Technical Data - Microphone inclusive of preamplifier

Transducer principle	back electret noise-compensated condensor microphone capsule
Frequency response at a distance of 2 cm from swivel-mounted mic boom	100 - 5,000 Hz (corresponding to ARINC 538 b)
Max. SPL	120 dB
Output voltage	400 mV +/- 3 dB at 114 dB and a distance of 6 mm
Terminating impedance	150 ohms
Operating voltage	6 - 16 V DC, approx. 16 mA, connections according to RTCA/DO 214

General Data for HMEC 45

Connection cable	1.8 m, single-sided round cable
Connector HMEC 45-CA	5-pin XLR
Connector HMEC 45-KA	Headphone PJ-055 (6.3 mm Ø) Microphone PJ-068 (5.25 mm Ø)
Power supply for NoiseGard® system	2 x 1.5 V AA size batteries or 2 x 1.2 V AA size rechargeable batteries
Operating time	Batteries: approx. 80 h Rechargeable batteries: approx. 20 h
Display	green LED for battery status