You'll hear and feel the difference immediately. When the ENC is turned ON, low frequency noise cancellation improves by an additional 17-22 dB. Special Features:
Electronic Noise Cancelling.
FAA TSO Approved C57 Cat. B and C58a.
Earphone Type: Dynamic(ENC) Noise-Canceling Mic: M-7A Amplified Electret
Earphone Impedance: Monaural, 150 Ohms nominal, stereo, 300 Ohms nominal per side Mic Impedance: 50 ohms +/- 20%
Earphone Sensitivity: 90 dB SPL on flat plate coupler, re 1mW input @ 1KHz Mic Sensitivity: 400mV RMS ?6dB into 150 ohm load @ 1kHz for 114dB SPL input
Earphone Frequency Response: 100-5,500 Hz Mic Freq Response: 300Hz--3.5KHz per RTCA DO 214
Earphone Plug: PJ-055 (.25" phone plug) Mic Plug: PJ-068 (.206" phone plug)
Boom Type: Patented Flex/Wire Cord: 5 ft.Straight
Headpad/Hardware: Super-Soft, Double-Foam Headpad,Lightweight Hardware Weight/Headset Only: 18 oz.