Sennheiser HMEC 350 NoiseGard Headphones

Sennheiser Updated: 2009-01-08 RSS
Sennheiser HMEC 350 NoiseGard Headphones

Featuring 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