Operation Manual

6
Sound Levels
Your hearing is very important to you and to us, so please take care when using this product. It is
strongly recommended that you follow the listed guidelines in order to prevent possible damage or
loss of hearing.
Establish a safe sound level
1. Over time your hearing will adapt to continuous loud sounds and will give the impression that
the volume has in fact been reduced. What seems normal to you may in fact be harmful. To
guard against this before your hearing adapts, set the volume to a low level.
2. Slowly increase the level until you can hear comfortably and clearly and without distortion.
3. Damage to your hearing is accumulative and is irreversible. Any ringing or discomfort in the
ears indicates that the volume it too loud.
4. Once you have established a comfortable listening level, do not increase the sound level.
The examples below may help you in recognising just how loud you have set the volume.
30dB Quiet library, soft whisper.
40dB Living room, fridge freezer, bedroom away from traffic.
50dB Normal conversation, quiet office, light traffic.
60dB Electric sewing machine.
70dB Vacuum cleaner, hair dryer, noisy restaurant.
THE FOLLOWING NOICE CAN BE HARMFUL UNDER CONSTANT EXPOSURE
80dB Average city traffic, alarm clock buzzer at 2 feet, food mixer.
90dB Motorcycly, heavy goods vehicle, petrol lawn mower.
100dB Pneumatic drill, chain saw, refuse vehicle, disco/night club.
120dB Rock bank concert, thunderclap.
PERMANENT LOSS OF HEARING – THRESHOLD OF PAIN
140dB Gunshot at 2 feet away.
180dB Rocket launching pad.
Safety Information