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HMEC 46-1
Instructions for use
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Safety instructions • Please read this instruction manual carefully and com- pletely before using the headset. • Make this instruction manual easily accessible to all users at all times. • Always include this instruction manual when passing the headset on to third parties. • During flight operation, do not use the headset for telephone calls. • With the NoiseGard™ active noise compensation switched on, typical aircraft sounds (for example, those from engines, propellers, warning alarms, etc.) ma
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• Only replace those parts of the headset whose replacement is described in this instruction manual. All other parts of the headset must be replaced by your Sennheiser agent. • Protect the headset from humidity. Use only a slightly damp cloth to clean the headset. For information on how to clean the headset, contact your Sennheiser agent. Intended use of the headset Intended use includes: • having read this instruction manual especially the chapter “Safety instructions”. • using the headset in
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The HMEC 46-1 headset The HMEC 46-1 headset with NoiseGard™ active noise com- pensation features dynamic, open headphones. The noise- compensating condenser microphone ensures excellent speech transmission even in noisy environments. Designed for use in aircraft cockpits. Features • NoiseGard™ active noise compensation reduces ambient noise by at least 15 dB – consequently the radio volume can be decreased • Extremely lightweight • Extremely comfortable to wear due to the patented two-piece auto
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Delivery includes •HMEC 46-1 headset •Cable clip • Wind and pop screen •Instruction manual •Carry bag •EASA Form 1 Operation Turning the microphone boom The microphone boom can be rotated. This allows the headset to be worn with the microphone boom posi- tioned on either the left or right-hand side of the head. 4
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Putting on the headset When putting on the headset, the patented two-piece headband adjusts automatically. Positioning the microphone Bend the flexible microphone boom so that the micro- phone is placed at the corner of the mouth. Maintain a dis- tance of approx. 2 cm between microphone and mouth. 5
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Flipping away one earcup The headset features a “flip-away” earcup for single-sided listening. Adjusting the volume directly on the audio system Connect the headset to the corresponding sockets of your audio system. Adjust the volume directly on the audio system. Hearing damage due to high volumes! CAUTION! This headset is capable of producing high sound pressure levels. Higher volumes or longer durations can damage your hearing! Set the volume to a medium level. Make sure that you can hear cr
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Adjusting the microphone sensitivity The microphone sensitivity has been factory pre-set to 80mV/Pa as per RTCA DO-214. You can change the microphone sensitivity by turning a small screwdriver in the direction of the arrow. + – 7
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The operating controls of the HMEC 46-1 Operating control I Volume controls LED NoiseGard™ ON/OFF switch Mono/stereo switch BOOM switch L/R 3.5 mm jack socket Battery compartment 2.5 mm jack socket Cable with Operating element operating control I -B-CP x x x -B-K x x x -B-KP x x x -BV-CP x x x x x -BV-K x xxxx xxx -BV-KP x xxxx xxx -V-CP x x x x -V-KP x xxxx -V-KX x xxxx -V-RP x xxxx 8
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Operating control II LED NoiseGard™ ON/OFF switch Cable with Operating element operating control II -CP x x -KP x x -NP x x 9
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Using the headset Switching NoiseGard™ on/off The NoiseGard™ ON/OFF switch allows you to switch the NoiseGard™ active noise compensation on or off. With NoiseGard™ switched off, the headset can be used as a conventional headset. Set the NoiseGard™ ON/OFF switch to the desired position: ON: NoiseGard™ is switched on. The LED lights up, indicating the battery charge status (see page 12) or power supply via the aircraft DC power supply system. OFF: NoiseGard™ is switched off. The LED is
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Switching between mono and stereo mode The mono/stereo switch allows you to switch between mono ( ) and stereo( ) mode, depending on the audio system. Set the mono/stereo switch to the desired posi- tion: mono ( ) or stereo ( ). Changing the left and right stereo channel The position “R” or “L” of the BOOM switch corre- sponds to the position of the microphone on the left or right side of the mouth. When the microphone boom is rotated to permit left or right side microphone orienta-
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The operating time with batteries/rechargeable batteries is approx. 100 hours. With NoiseGard™ switched on (see page 10), the LED provides information on the remaining battery/recharge- able battery capacity. LED lights up yellow: The battery capacity is suffi- cient. LED lights up red: The batteries are flat. Replace the batteries. Activating the “auto shut-off” function The battery-saving “auto shut-off” function automati- cally switches the NoiseGard™ electronics off when the headset
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Connecting a mobile telephone (cable -BV-K / -BV-KP only) The 2.5 mm 3-pole jack socket allows you to connect amobile telephone. For this purpose, the NoiseGard™ active noise compensation must be switched on and the microphone connector must be connected to the aircraft radio/audio. A suitable adapter for your mobile telephone with 2.5 mm jack socket is available from your Sennheiser agent. Danger of accident due to reduced attention! CAUTION! Making telephone calls or operating the mobile te
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Connecting an additional audio player (cable -BV-K / -BV-KP only) The 3.5 mm jack socket allows you to connect and listen to an audio player (not supplied) through the headset. For this purpose, the NoiseGard™ active noise compensation must be switched on. Danger of accident due to reduced attention! CAUTION! Listening to music or operating an audio device limits your attention and may cause accidents. During flight operation, do not use the headset for listening to additional audio sources!
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Care and maintenance Cleaning the headset Use a soft, slightly damp cloth to clean the headset from time to time. If the headset is very dirty, use a cloth dampened with mild, soapy water. Danger of short-circuit due to the ingress of CAUTION! water! Water entering the housing of the headset can cause a short-circuit and damage the electronics. Use only a slightly damp cloth to clean the headset. Do not use any solvents or cleansing agents. Replacing the ear pads For reasons of hygiene, the ear
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Accessories and spare parts By changing the cables, you can simply retrofit different operating controls (see “The operating controls of the HMEC 46-1” on page 8 and 9) or connectors (see “Product variants” on page 17). • Cable -CP Cat. No. 500852 • Cable -V-CP Cat. No. 500846 • Cable -B-CP Cat. No. 500837 • Cable -BV-CP Cat. No. 500838 • Cable -KP Cat. No. 500842 • Cable -V-KP Cat. No. 500848 • Cable -B-K Cat. No. 502183 • Cable -BV-K Cat. No. 500839 • Cable -NP Cat. No. 500855 • Cable -V-RP Ca
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Product variants Model Cat. No./
Part Number HMEC 46-1 500854 / 046-35 HMEC 46-1-CP 500472 xx x x 046-35-999-3211 HMEC 46-1-B-CP 500478 xx x x x 046-35-999-2291 HMEC 46-1-BV-CP 500479 xx x x x 046-35-999-2281 HMEC 46-1-V-KP 500476 xxxx x 046-35-999-3161 HMEC 46-1-B-K 502180 xxx xx 046-35-999-1191 HMEC 46-1-BV-K 500477 xxx xx 046-35-999-1171 Cable -BV-KP 504030 xxxxxx 999-2171 Cable -B-KP 504047 xxxxxx 999-2191 Cable -V-KX 502437 x xxx x x 999-4161 Single-sided round cable, 6-p
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Specifications Headphones Transducer principle dynamic, open Ear coupling supra-aural Frequency response 20–14,000 Hz Impedance mono/stereo 600 Ω/1,200 Ω Characteristic SPL 93 dB SPL at 1 kHz, 1 mW 95 dB SPL at 1 kHz, 1 V, mono Active attenuation ≥ 15 dB (300–700 Hz) THD < 1% at 1 kHz, 90 dB SPL Contact pressure approx. 3 N Microphone incl. preamplifier Type BKE 46 Transducer principle pre-polarized condenser microphone, noise-compensating Frequency response 100–6,000 Hz Output voltage adju
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General data Temperature range operation: –15°C to +55°C storage: –55°C to +70°C Weight without cable approx. 150 g Power supply for 2x 1.5 V AA alkaline battery NoiseGard (IEC LR 6) or 2x 1.2 V AA rechargeable battery (IEC LR 6) or 12–35 V DC via the aircraft DC power supply system (on suitably equipped aircraft), max. 35 mA 19
