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Sennheiser HMEC 305-C manual Using the headsets, Turning NoiseGard on/off, Adjusting the volume

Models: HMEC 306 HMEC 305-C HMEC 302 HMEC 305 HMEC 322 HMEC 400 HMDC 322 HMEC 300

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Using the headsets

Using the headsets

Turning NoiseGard™ on/off

With the NoiseGard™ active noise compensation turned off, the headset can be used as a conventional headset.

Turn on the NoiseGard™ active noise compensation by setting the ON/OFF switch to ON. When using the BP-03 battery pack, set the NoiseGard™ ON/OFF switch to ON and use the ON/OFF switch on the battery pack.

Mono/Stereo selection (except HMEC 305, HMEC 305-C, HMEC 322 and HMDC 322)

In general, you’ll receive a mono sound source so that the Mono/Stereo switch can remain set to “Mono”. When using a stereo intercom system, set the Mono/Stereo switch to “Stereo”.

Adjusting the volume

Exposure to loud sounds can cause hearing damage!

Set the volume control to a medium value. Make sure that you can hear critical sounds such as warning alarms.

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Sennheiser HMEC 305-C, HMEC 300, HMDC 322, HMEC 400 manual Using the headsets, Turning NoiseGard on/off, Adjusting the volume

Contents

HMEC HMEC HMEC HMEC 305-C HMEC HMEC HMEC HMDC HeadsetInstructions for use Contents Safety tips Safety tips Headset features HMEC 300 NoiseGard headsetHMEC 302 NoiseGard headset Product variantsHMEC 305 NoiseGard headset HMEC 306 NoiseGard headset HMEC 305-CNoiseGard headsetHMEC 322 NoiseGard headset HMEC 400 NoiseGard headset HMDC 322 NoiseGard headsetHMEC 302, HMEC 305 and HMEC 306 headsets Delivery includesRecommended accessories Replaceable gel ear cushions Cat. NoHMEC 300 and HMEC 400 headsets Connecting the headsetsConnecting cables for headsets HMEC 302 headsetHMEC 306 headset HMEC 322 and HMDC 322 headsetsHMEC 305-Cheadset Connecting cable for HMEC 305-CPowering options Danger of short circuit 1. Connecting the headset to the on-boardsystemHMEC 300 and HMEC 400 headsets HMEC 322 and HMDC 322 headsets Headset HMECHeadset HMEC 305-C HMEC 305 headsetLED operation and battery status indication Inserting / replacing the the batteriesAttaching the battery pack to clothing Connecting the headset Preparing the headsets for use Adjusting the headbandPositioning the microphone Relocating the microphone boomTilt the microphone for final positioning 1.Pull the wind screen from the microphone Turning NoiseGard on/off Using the headsetsAdjusting the volume Exposure to loud sounds can cause hearing damageMic Gain Adjustment Adjusting the microphone gainFolding up the headphones Attaching the cable clipReplacing the wind screen Spare partsReplacing the ear cushions Put the new headband padding around the headband Replacing the headband paddingReplace the headband padding if it is damaged Join the fastening stripsIn case of difficulty ProblemPossible cause and what to do Problem Possible cause and what to doValuable information on NoiseGard The NoiseGard principlePage The above diagram shows noise compensation with NoiseGard Passive hearing protectors effectively attenuate noise from the middle and upper frequency range, the effect decreasing sharply in the lower range. However, active noise compensation with NoiseGard combined with passive hearing protectors results in a reduction of noise of approx. 25 dB in the 25-500Hz frequency range. The total attenuation resulting from active and passive noise compensation is about 30 dB over the entire audio range Connector assignment Microphone incl. preamplifier Technical dataHeadphones HMECHMEC General dataHMEC HMECTechnical data HMEC 305-CHMDC HeadphonesHMEC HMECHMEC 305-C HMDCCertificate of Conformity