HMEC 46-1 Instructions for use
Safety instructions • Please read this instruction manual carefully and completely 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.
• 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”.
The HMEC 46-1 headset The HMEC 46-1 headset with NoiseGard™ active noise compensation features dynamic, open headphones. The noisecompensating condenser microphone ensures excellent speech transmission even in noisy environments. Designed for use in aircraft cockpits.
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 positioned on either the left or right-hand side of the head.
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 microphone is placed at the corner of the mouth. Maintain a distance of approx. 2 cm between microphone and mouth.
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. CAUTION! Hearing damage due to high volumes! 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.
Adjusting the microphone sensitivity The microphone sensitivity has been factory pre-set to 80 mV/Pa as per RTCA DO-214. You can change the microphone sensitivity by turning a small screwdriver in the direction of the arrow.
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.
Operating control II Cable with operating control II LED NoiseGard™ ON/OFF switch Operating element -CP x x -KP x x -NP x x 9
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. 왘 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 off.
Switching between mono and stereo mode The mono/stereo switch allows you to switch between mono ( ) and stereo ( ) mode, depending on the audio system. 왘 Set the mono/stereo switch to the desired position: mono ( ) or stereo ( ). Changing the left and right stereo channel The position “R” or “L” of the BOOM switch corresponds to the position of the microphone on the left or right side of the mouth.
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/rechargeable battery capacity. LED lights up yellow: The battery capacity is sufficient. LED lights up red: The batteries are flat. Replace the batteries.
Connecting a mobile telephone (cable -BV-K / -BV-KP only) The 2.5 mm 3-pole jack socket allows you to connect a mobile 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.
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. CAUTION! Danger of accident due to reduced attention! Listening to music or operating an audio device limits your attention and may cause accidents.
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. CAUTION! Danger of short-circuit due to the ingress of 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.
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 Cable -V-CP Cable -B-CP Cable -BV-CP Cable -KP Cable -V-KP Cable -B-K Cable -BV-K Cable -NP Cable -V-RP Cable -BV-KP Cable -B-KP Cable -V-KX Audio cable, length 0.6 m, 2 x 3.5 mm stereo jack plug • Cable for mobile telephone, length 0.6 m, 2 x 2.
Product variants Model Cat. No./ Part Number HMEC 46-1 500854 / 046-35 HMEC 46-1-CP 500472 046-35-999-3211 HMEC 46-1-B-CP 500478 046-35-999-2291 HMEC 46-1-BV-CP 500479 046-35-999-2281 HMEC 46-1-V-KP 500476 046-35-999-3161 HMEC 46-1-B-K 502180 046-35-999-1191 HMEC 46-1-BV-K 500477 046-35-999-1171 Cable -BV-KP 504030 999-2171 Cable -B-KP 504047 999-2191 Cable -V-KX 502437 999-4161 Single-sided round cable, length 1.85 m XLR-5 connector XLR-3 connector ¼“ (6.
Specifications Headphones Transducer principle Ear coupling Frequency response Impedance mono/stereo Characteristic SPL dynamic, open supra-aural 20–14,000 Hz Active attenuation 600 Ω/1,200 Ω 93 dB SPL at 1 kHz, 1 mW 95 dB SPL at 1 kHz, 1 V, mono ≥ 15 dB (300–700 Hz) THD Contact pressure < 1% at 1 kHz, 90 dB SPL approx. 3 N Microphone incl.
General data Temperature range Weight without cable Power supply for NoiseGard operation: –15°C to +55°C storage: –55°C to +70°C approx. 150 g 2x 1.5 V AA alkaline battery (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.
Connector assignment Cable -B-CP, -BV-CP, -CP, -V-CP Solder side 2 3 4 5 1 1 2 3 4 5 Audio Hi Audio Lo / DC– Microphone Hi Microphone Lo Power supply NoiseGardTM (DC+) Cable -NP Solder side 1 2 3 4 5 6 7 8 Audio Hi Audio Lo not assigned Microphone Lo Microphone Hi not assigned DC– Power supply NoiseGardTM (DC+) 1 2 5 3 4 4 5 6 Power supply NoiseGardTM (DC+) Audio Lo / DC– Audio Hi left Audio Hi right Microphone Hi Microphone Lo Cable -V-RP Solder side 1 2 3 20 6
Cable -B-K, -BV-K, -KP, -V-KP, -V-KX 1/4" (6.
Manufacturer Declarations Warranty Sennheiser electronic GmbH & Co. KG gives a warranty of 5 years on this product. For the current warranty conditions, please visit our web site at www.sennheiser.com or contact your Sennheiser partner. CE Declaration of Conformity This equipment is in compliance with the essential requirements and other relevant provisions of Directive 89/336/EC. The declaration is available at www.sennheiser.com.
Sennheiser electronic GmbH & Co. KG 30900 Wedemark, Germany www.sennheiser.com Printed in Germany Publ.
