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Overview on the different noise levels
10 dB Heartbeat
80 dB Heavy traffic or telephone ringing
20 - 30 dB Whisper
90 dB Pneumatic drill
40 dB Average home
100 dB Power mower
50 dB Light traffic
120 dB Boom box in car
60 dB Normal conversation
130 dB Pain level
70 dB Vacuum cleaner
140 dB Jet plane 30 meters overhead
It is important to know that doubling the power increases the noise level by 3 dB. The human hearing does
only recognizes a doubling of the sound level when the noise level is increased by 10 dB. Damaging the
hearing does not depend on the sound level but on the noise level and starts way before the pain level.
Many people deceive themselves by thinking that noise is something they can get accustomed to. It is
possible that a positive opinion of a certain noise can reduce the physiological reaction, but the slow impacts
on the inner hearing must not be neglected: over stimulation and continuous elimination of the Cortic organ's
hair cells.
The reason why some people have got accustomed to a certain noise level and are no longer disturbed is
that they have already suffered a hearing damage. This damage make the insensitive to those frequencies
forming the loudest part of the noise. Getting accustomed to noise does not mean anything other than trying
to get along with the hearing loss in everyday life. The hearing loss itself cannot be healed, it can only be
compensated by hearing aids.
Subjectively, the hearing loss feels like dampened ears. This effect weakens with the time, but a loss in
hearing sensitivity often remains.
In order to relax the hearing sufficiently, the noise level should not exceed 70 dB(A) for 10 hours. Higher
noise levels during this relaxing period can prevent the relaxation and promote a permanent hearing damage
(Tinitus) or hearing loss.
Therefore:
Whoever wants to maintain his hearing should use hearing protectors!
4.
OPERATING DETERMINATIONS
The stereo PA amplifiers of the E-series with integrated limiter have been specially designed for stage and
the disco applications. The amplifiers may be used in stereo operation or in mono bridge operation. The
amplifiers and the speakers connected are protected through extensive protective circuits.
Models
E-200
,
E-300
,
E-600
and
E-900
: This product is allowed to be operated with an alternating
current of 230 V, 50 Hz.
Model
E-1300:
This product is allowed to be operated with an alternating current of 115/230 V, 50/60 Hz.
This device is designed for indoor use only and both for mobile use and for permanent installations.
By operating amplifying systems, you can produce excessive sound pressure levels that may lead to
permanent hearing loss. Please refer to the explanations under "Legal instructions".
Please note:
operating an amplification system in public or industrial areas, a series of safety instructions
have to be followed that this manual can only give in part. The operator must therefore inform himself on the
current safety instructions and consider them.
Do not shake the device. Avoid brute force when installing or operating the device.
When choosing the installation-spot, please make sure that the device is not exposed to extreme heat,
moisture or dust. There should not be any cables lying around. You endanger your own and the safety of
others!
This device must never be operated or stockpiled in surroundings where splash water, rain, moisture or fog
may harm the device. Moisture or very high humidity can reduce the insulation and lead to mortal electrical
shocks. When using smoke machines, make sure that the device is never exposed to the direct smoke jet
and is installed in a distance of 0.5 meters between smoke machine and device.
Содержание E-1300
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