Bedienungsanleitung Omnitronic PAS-212 (Seite 25 von 42) (Deutsch, Englisch)

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Everybody operating amplification systems should know to what sound pressure levels he exposes his or the

audience's hearing. As an average levels between 75 and 105 dB(A) in the discotheque or 95 and 115 dB(A)

at a rock concert are reached. Individual peaks can exceed the pain level at 130 dB(A). Such levels are

typical for motor chainsaws or jack hammers.

Overview on the different noise levels

10 dB Heartbeat

20 - 30 dB Whisper

40 dB Average home

50 dB Light traffic

60 dB Normal conversation

70 dB Vacuum cleaner

80 dB Heavy traffic or telephone ringing

90 dB Pneumatic drill

100 dB Power mower

120 dB Boom box in car

130 dB Pain level

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 recognize a doubling of the sound level when the noise level is increasey by 10 dB. Damaging the

hearing does not depend on the sound level but on the noise level and starts way befor 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 unsensitive to those frequencies

forming the loudest part of the noise. Getting accustomed to noise does not mean anything oter 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!

START-UP

This speaker-system must only be connected with an appropriate power amplifier. The amplifier power must

correspond with the speaker-system power. An amplifier with too little power can also destroy a speaker-

system with a higher power range.

Choosing an appropriate power amplifier

Before starting with the installation, you must clarify how many speaker-systems you would like to install in

the room.

In order to increase the sound pressure level two speaker-system pairs should be connected with the power

amplifier. Please note that the impedance is only half the value when you connect two speaker-systems with

one channel of the power amplifier. Please make sure that the power amplifier is qualified for this operation

mode.

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