David Clark starts with a lightweight, comfortable headset and adds ENC technology for a super quiet ride. Soft air-flow pillow headpad and new “undercut” gel-filled ear seals provide extraordinary comfort. The David Clark H10-13X ANR Headset has advanced Electronic Noise Cancelling technology that assures an amazingly quiet flight. When ENC is active, noise cancellation improves by 12-17 dB. The ENC system and exclusive M-7A noise cancelling electret microphone provide unsurpassed performance and clear crisp transmission and reception. Also stereo compatible for use with stereo intercom and cabin entertainment systems.