Using The Headsets; Turning Noisegard™ On/Off; Mono/Stereo Selection (Except Hmec 305, Hmec 305-C, Hmec 322 And Hmdc 322); Adjusting The Volume - Sennheiser NoiseGard HMDC 322 Instructions For Use Manual

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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