HME 27 / HMD 27 Series ATC Headsets
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HME 27 / HMD 27 Series ATC Headsets - 1

FACT SHEET Confidence where sound matters Designed for demanding air traffic controllers and C3 users, the Sennheiser HME/HMD 27 Series headsets bring high quality sound to the control room with an exceptional degree of comfort. Its lightweight design succeeds in providing high passive attenuation while remaining comfortable over long hours of use. A noise-cancelling microphone enhances voice intelligibility - even in noisy environments, for confident, clear communication and closed ear cups increase listening accuracy. Sennheiser’s unique, split two-piece headband alleviates pressure on the top of the head for first class comfort and users can choose left or right boom microphone positioning. Sennheiser ActiveGard® technology protects users’ hearing against acoustic injury caused by a sudden sound burst on the line, with no risk of communication drop-out. BENEFITS AND FEATURES - Sennheiser Voice Clarity for accurate communication, provides a natural listening experience - Excellent speech transmission Noisecancelling microphone reduces ambient noise to improve intelligibility and reduce “call-back/read-back” events - Two channel stereo mode possible to use one channel for radio communications and one for telephone communications on dual sided headset - Sound protection from acoustic injury caused by sudden sound bursts on the line with Sennheiser ActiveGard® technology - Single-sided listening with flip away ear cup on dual sided headset - Flexible microphone boom - can be worn on either left or right-hand side - Superb wearing comfort with patented two-piece automatic headband and soft circumaural ear pads - Choice of PTT switches for personal preference - Cable and connector A wide range of cables and connectors for customization

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HME 27 / HMD 27 Series ATC Headsets - 2

FACT SHEET Headphones Sound pressure level: dB SPL @ 1 KHz, 0.5 V dB SPL @ 1 KHz, 1 mW dB SPL @ 1 KHz, 1V Max SPL* [dB] 122 ActiveGard off 122 ActiveGard off 122 ActiveGard off 122 122 122 ActiveGard off 110 ActiveGard on 110 ActiveGard on 110 ActiveGard on 110 ActiveGard on THD, total harmonic distortion at 100 dB SPL at 1 kHz Frequency response Impedance * Limited by ActiveGard® Microphone Microphone type Sensitivity / Output voltage Electret Dynamic Dynamic Dynamic Dynamic Electret mV/Pa. Preset = 80 mV/Pa +0/-2 dB, equals 800 mV +0/-2 dB @ 114 dB SPL 0.12 mV/Pa @ 1 kHz 0.5 mV/Pa @ 1 kHz...

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HME 27 / HMD 27 Series ATC Headsets - 3

FACT SHEET General Data HME 27 ATC/C3 HMD 27 ATC/C3 w. HMD 27 ATC/C3 HMD 27 ATC/C3 HMD 27 ATC/C3 HME 27 S ATC/C3 300 ohm Std Boom w. 5 ohm Mic 5 ohm w/o AG w/o AG Wearing style Headband, Headband, Headband, Headband, Headband, Headband, double-sided double-sided double-sided double-sided double-sided single-sided Ear coupling Closed, circumaural Closed, circumaural Closed, circumaural Closed, circumaural Closed, circumaural Closed, circumaural (around-the-ear) (around-the-ear) (around-the-ear) (around-the-ear) (around-the-ear) (around-the-ear) 2 years 2 years 2 years 2 years 2 years 2 years...

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