Sennheiser HMEC 350 NoiseGard Headphones
Sennheiser Updated: 2009-01-08 RSSFeaturing NoiseGard active noise compensation and excellent passive attenuation, the HMEC 350 pilot's headset is an ideal choice for helicopters, propeller and turboprop aircraft.
Features
* Constant attenuation of up to 40 dB throughout the entire audio range
* Superior speech intelligibility
* Electronics fully integrated into headphone capsules
* Can be used as conventional headphones when supply voltage is switched off
* Noise-compensated boom microphone for superior speech transmission
* 5 year warranty
Delivery Includes
* 1 HMEC 350 NoiseGard™
* 1 x 3-pin input socket for aircraft's internal power supply
* 1 carrying case for headset and accessories
* 1 MZQ 2002-1 cable clip
* 1 MZW 45 windshield
Technical Data
Transducer principle (Headphones): dynamic
Ear coupling: circumaural
Attenuation (active + passive): > 25 - 40 dB
Contact pressure: ca. 10 N
Weight w/o cable: 370 g
Transducer principle (Microphone): Electret - MKE 45-1 bipolar
Max. Sound pressure level (aktiv): 120 dB
Output voltage: 400 mV +/- 3 dB / 114 dB/SPL
Operating voltage (stand alone): typ. 16 VDC (8-16 VDC, 8-25 mA)
Operating temperature: -10 °C...+55 °C
Storage temperature: -55 °C...+55 °C
NoiseGard-Supply: 12 - 35 VDC ca. 27 mA, max. 80 mA
Specials: NoiseGard on/off & mono/stereo switch
Connection cable: 1.5 m
Connector: 6.3 mm stereo-headphones, PJ-068-microphone, XLR-3 NoiseGard power, volume control for headphones
Frequency response (headphones): 45.....15000 Hz
Frequency response (microphone): 300.....5000 Hz
Instruction Manual
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