Important safety instructions
Danger of hearing damage due to high volumes
This is a professional transmission system. Commercial use is subject to the rules and regulations of the trade association responsible. Sennheiser, as the manu- facturer, is therefore obliged to expressly point out possible health risks arising from use.
The HDE 2020 D and EK 2020 D receivers are capable of producing sound pressure exceeding 85 dB(A). 85 dB(A) is the sound pressure corresponding to the maximum permissible volume which is by law (in some countries) allowed to affect your hearing for the duration of a working day. It is used as a basis according to the specifications of industrial medicine. Higher volumes or longer durations can damage your hearing. At higher volumes, the duration must be shortened in order to prevent hearing damage. The following are sure signs that you have been subjected to excessive noise for too long a time:
•You can hear ringing or whistling sounds in your ears.
•You have the impression (even for a short time only) that you can no longer hear high notes.
Intended use of the devices
Intended use includes:
•using the devices for professional purposes,
•having read this instruction manual, especially the chapter “Important safety instructions” on page 2,
•using the devices within the operating conditions and limitations described in this instruction manual.
“Improper use” means using the devices other than as described in this instruction manual, or under oper- ating conditions which differ from those described herein.
Safety instructions for Li-Polymer and Ni-
MH rechargeable batteries and batteries
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