Sennheiser ew 300 iem Instructions for Use - Page 34

Attention! High Volume - system

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Keep the devices away from central heating radiators and electric heaters. Never expose them to direct sunlight. Use the devices in dry rooms only. Use a damp cloth for cleaning the devices. Do not use any cleansing agents or solvents. Attention! High Volume! This is a professional transmission system. Commercial use is subject to the rules and regulations of the trade association responsible. Sennheiser, as the manufacturer, is therefore obliged to expressly point out possible health risks arising from use. This system is 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 damage. The following simple formula applies: Double the volume = half the duration An increase of 3 dB corresponds to doubling the volume; you can thus go by the following table: Maximum duration 8 hours 4 hours 2 hours 1 hour 30 minutes 15 minutes 8 minutes 4 minutes 2 minutes 1 minute Pain threshold at a sound pressure of: 85 dB 88 dB 91 dB 94 dB 97 dB 100 dB 103 dB 106 dB 109 dB 112 dB 120 dB The following are sure signs that you have been subjected to excessive noise for too long a time: ƽ You can hear ringing or whistling sounds in your ears. ƽ You have the impression (even for a short time only) that you can no longer hear high notes. ƽ After using this system, your hearing is impaired for a short time. In all of the above cases, you should consult a specialist or at least have your hearing tested. Ear damage builds up gradually. Once the initial symptoms have died down, you no longer perceive acute changes. In the long term, however, the repeated effects of loud noises can cause severe hearing impairment or even deafness. 36

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36
Keep the devices away from central heating radiators and electric heaters.
Never expose them to direct sunlight.
Use the devices in dry rooms only.
Use a damp cloth for cleaning the devices. Do not use any cleansing agents
or solvents.
Attention! High Volume!
This is a professional transmission system. Commercial use is subject to the
rules and regulations of the trade association responsible. Sennheiser, as the
manufacturer, is therefore obliged to expressly point out possible health risks
arising from use.
This system is 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
damage. The following simple formula applies:
Double the volume = half the duration
An increase of 3 dB corresponds to doubling the volume; you can thus go by
the following table:
Maximum duration
at a sound pressure of:
8 hours
85 dB
4 hours
88 dB
2 hours
91 dB
1 hour
94 dB
30 minutes
97 dB
15 minutes
100 dB
8 minutes
103 dB
4 minutes
106 dB
2 minutes
109 dB
1 minute
112 dB
Pain threshold
120 dB
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.
±
After using this system, your hearing is impaired for a short time.
In all of the above cases, you should consult a specialist or at least have your
hearing tested. Ear damage builds up gradually. Once the initial symptoms
have died down, you no longer perceive acute changes. In the long term,
however, the repeated effects of loud noises can cause severe hearing
impairment or even deafness.