VocoPro UHF-3800, Руководство пользователя

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4
Listening For A Lifetime
Selecting fine audio equipment such as the unit you've just purchased is only the
start of your musical enjoyment. Now it's time to consider how you can maximize the
fun and excitement your equipment offers. VocoPro and the Electronic Industries
Association's Consumer Electronics Group want you to get the most out of your
equipment by playing it at a safe level. One that lets the sound come through loud
and clear without annoying blaring or distortion and, most importantly, without
affecting your sensitive hearing.
Sound can be deceiving. Over time your hearing "comfort level" adapts to a higher
volume of sound. So what sounds "normal" can actually be loud and harmful to your
hearing. Guard against this by setting your equipment at a safe level BEFORE your
hearing adapts.
To establish a safe level:
•
Start your volume control at a low setting.
•
Slowly increase the sound until you can hear it comfortably and clearly, and without
distortion.
Once you have established a comfortable sound level:
•
Set the dial and leave it there.
•
Pay attention to the different levels in various recordings.
Taking a minute to do this now will help to prevent hearing damage or loss in the
future. After all, we want you listening for a lifetime.
Used wisely, your new sound equipment will provide a lifetime of fun and enjoyment.
Since hearing damage from loud noise is often undetectable until it is too late, this
manufacturer and the Electronic Industries Association's Consumer Electronics
Some common decibel ranges:
Level
30
40
50
60
70
80
Example
Quiet library, Soft whispers
Living room, Refrigerator, Bedroom away from traffic
Light traffic, Normal Conversation
Air Conditioner at 20 ft., Sewing machine
Vacuum cleaner, Hair dryer, Noisy Restaurant
Average city traffic, Garbage disposals, Alarm clock at 2 ft.
The following noises can be dangerous under constant exposure:
Level
90
100
120
140
180
Example
Subway, Motorcycle, Truck traffic, Lawn Mower
Garbage truck, Chainsaw, Pneumatics drill
Rock band concert in front of speakers
Gunshot blast, Jet plane
Rocket launching pad
-Information courtesy of the Deafness Research Foundation
Listening for a Lifetime