Sennheiser SH350 Instructions For Use Manual page 29

Problem
Active noise compensation but
very low volume communication
Active noise compensation but
reduced intelligibility
Communications in one ear only
(only HMEC 350, HMEC 352,
HMEC 356 and HMEC 356)
Possible cause and what to do
The volume control is set too low.
Check the volume setting of the headset.
The headphone connection has been pulled out (except HMEC 355, HMEC 355-C and
HMEC 356).
Check to see if the headphone jack plug is correctly connected.
The microphone connection has been pulled out (except HMEC 355, HMEC 355-C and
HMEC 356).
Check to see if the microphone jack plug is correctly connected.
You are using a stereo intercom system but the headset is set to mono operation.
Set the Mono/Stereo switch to "Stereo".
You are receiving a mono source but the headset is set to stereo operation.
Set the Mono/Stereo switch to "Mono".
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