Technical Specifications
Audio Speaker
Impedance - 300 ohm stereo
Effective Frequency Range - 80 - 18k Hz
Boom Microphone
Type - M65 electret noise cancelling
Boom - Full flex type; R/L interchangeable
Frequency Response - 300Hz - 8kHz
Source Resistance - 220 - 2200 ohms
Active Noise Attenuation
ANR effective frequency range - 80 - 600 Hz
Maximum expected additional attenuation - 21dB
Nominal current - 32 mA
Voltage 12.0 - 18.0 VDC at the plug
Passive Noise Attenuation*
8.7db 6.7db 17.0db 29.5db 38.0db 46.6db
@ @ @ @ @ @
125 Hz 250 Hz 500 Hz lOOO Hz 2000 Hz 3150 Hz
*estimated per informal test: USAARL; March 1990
Talk-thru Capability
Binaural function integrated with active noise reduction
Compressor/limiter - limits binaural audio to 82db at ear
Current draw - 30mA
Source voltage - 9v
Mechanical
Domes - polycarbonate or ABS
Headband - beryllium/copper spring steel
Cable Length - 36"
Cable type - 6 conductor; polyurethane jacket; polypropylene insulation
Plug - Hirose Hr 10A
Weight -16 oz. (w/o cable)
Environmental Testing
Noise cancelling/audio modules meet Gentex Corp. PS-0276 environmental
standards*
Attenuation Testing
Meets MIL-STD-912/PS-0276/3*
* Per Gentex report dated 6-17-03