A lightweight supraural closed cup Sennheiser headset designed to actively reduce cockpit noise, with dual volume control and stereo/mono switch. Individual volume controls.
This closed form means that this dynamic headset not only attenuates cockpit noise actively by way of the NoiseGard system but also provides passive protection against ambient noise in the high-frequency range. This combination of active and passive noise compensation allows the HMEC25 to cover the complete noise spectrum, thereby reducing the noise level by more than 15dB. The noise level is thus attenuated by about 65%!
Sennheiser HMEC25-KAS Aviation Headset features:
15 dB active noise cancellation
16 dB passive noise reduction
Extreme lightweight comfort (5.9 oz)
Noise-canceling electret microphone
In-line battery pack
Dual volume controls and stereo/mono switch
Headphones Specs
Transducer Principle Dynamic, closed back
Frequency Response 16-22,000 Hz
Nominal Impedance 200 ohm (active), 170 ohm (passive)
Attenuation 15 dB (active), 16 dB (passive)
Weight Wo Cable approx. 6 oz.
Operating Voltage Not applicable
Ear Coupling Supraural
Headband Pressure approx. 2.5 N
Sensitivity 94 dB
Distortion < 1%
Headset Microphone Specs
Transducer Principle Electret, Noise Canceling
Frequency Response 300-5000 Hz
Output Voltage 8-16 VDC, 6mA
Sensitivity 400mV @ 3 dB (incl. preamplifier)
Connectors
Connector PJ068, 1/4 phono