Related Manuals for Sennheiser NoiseGard HMEC 45-CA
Summary of Contents for Sennheiser NoiseGard HMEC 45-CA
- Page 1 HMEC 45-CA GEBRAUCHSANLEITUNG INSTRUCTIONS FOR USE P/N 045-230-125 NOTICE D‘EMPLOI ISTRUZIONI PER L‘USO INSTRUCCIONES PARA EL USO HMEC 45-KA GEBRUIKSAANWIJZING P/N 045-230-115...
- Page 2 Forest, no wind The unit of sound levels is the decibel (dB). A noise reduction of 10 dB is generally perceived as halving of the loudness, another 10 dB decrease corresponds to a loudness reduction of 75 %, and so on.
- Page 3 HMEC 45-KA / HMEC 45-CA A headset comprises two units, a headphone and a microphone. The HMEC 45- KA/-CA headset is mostly used for communication in aircraft cockpits. The microphone is a high quality back-electret condenser microphone. As per TSO / ARINC it receives its operating voltage via a connector from the aircraft´s internal power supply.
- Page 4 NoiseGard the battery compartment. When power is switched on, a green LED lights up. When the power supply is switched off or when the batteries go flat the headphone works like an ordinary headphone without noise compensation. As the microphone is connected to the aircraft´s internal power supply, it does not depend on the batteries and will remain in operation should the batteries fail.
- Page 5 Adjusting the headband...
- Page 6 - No ! When people use headphones, they tend to choose a higher volume than with loudspeakers. Listening with high volume levels for a longer time can lead to permanent hearing defects. Because the circuitry is reducing the ®...
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Page 7: Circuit Diagram And Pin Connections
Circuit diagram and pin connections HMEC 45-KA headphone capsule left headphone capsule right microphone screen sensor sensor microphone microphone left right screen screen or wh br gn ye cable splice DC-box screen ye bl bk PJ–068 PJ–055 microphone headphone... - Page 8 Circuit diagram and pin connections HMEC 45-CA headphone capsule left headphone capsule right microphone screen sensor sensor microphone microphone left right screen screen or wh br gn ye cable splice DC-box screen XLR 5...
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Page 9: General Data
(mono) 320 per side (stereo) same volume for active and passive < 1 % Active compensation 10 dB 3 dB between 400 Hz and 1 kHz Mikrophone incl. preamplifier Transducer principle Noise-cancelling back-electret condenser microphone capsule Frequency response (2 cm distance between mic... - Page 10 Aktuelle Informationen zu Sennheiser-Produkten erhalten Sie auch im Internet unter „http://www.sennheiser.com“. Up to date information on Sennheiser products can also be found on the Internet under “http://www.sennheiser.com”. Vous trouverez également toutes les informations actuelles relatives aux produits Sennheiser sur Internet, sous “http://www.sennheiser.com“.