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8
WORKING SAFELY WITH SOUND
Although your new unit will not make any noise until you feed it signals, it has
the capability to produce sounds which when monitored through a PA system or
headphones can damage hearing over time.
The table below is taken from the US Department of Labor directive on
occupational noise exposure (1926.52):
DURATION PER DAY,
Conforming to this directive will minimise the risk of hearing damage caused by
long listening periods. A simple rule to follow is — the longer you listen, the lower
the average volume should be.
Please take care when working with your audio. If you are manipulating controls
which you don't understand (which we all do when we are learning), make sure
your monitors are turned down.
Most importantly — don't be afraid to experiment to find out how each parameter
affects the sound — this will extend your creativity and help you to get the best
results.
Recommended headphone impedance is 50-600 ohms.
PERMISSIBLE NOISE EXPOSURE
SOUND LEVEL dBA
HOURS
SLOW RESPONSE
8
6
4
3
2
1.5
1
0.5
<0.25
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