Sensaphonics 3D AARO User Manual page 3

SOUND LEVELS & HEARING PROTECTION
Studies show conclusively that, without guidance, IEM users
tend to monitor at the volume they used for floor wedges.
We strongly recommend that you learn to monitor at lower
levels.
fl The 3D Active Ambient earphones provide up to
37 dB of broadband isolation from ambient noise while
still offering controlled access to the sounds around you.
You will get full, rich sound with incredible detail at
amazingly modest volume levels. We urge you to make
a conscious effort to turn it down.
Noise induced hearing loss (NIHL) is a function of exposure
time, the average noise level and the peak level of very loud
sounds. The following table shows recommended daily
noise exposure limits on the OSHA and more conservative
NIOSH (formerly "Equal Energy") scales. Even under
optimistic OSHA limits, 2 hours at 100 dBA is the safe limit
without protection – and this assumes no exposure to levels
over 85 dB the rest of the day. For your safety, we strongly
recommend using the NIOSH guideline.
Level, dBA
OSHA
NIOSH
Some people are more susceptible to hearing loss than
others. Tracking exposure on the basis of an average time and
sound level will only protect the "average" person, so these
guidelines do not offer a guarantee of safety for all.
We strongly urge all musicians and engineers to have annual
hearing checks from a certifi ed audiologist. By tracking
your hearing response and listening habits over time, you
can spot any changes and deal with them before serious
damage occurs.
Again, we can't stress this enough:
See your audiologist regularly!
For more information on hearing conservation, visit our
website, www.sensaphonics.com.
85 88 90 92 94 95 97 100 105 110 115 120
16
hr 8 hr 6 hr
8 hr 4 hr
4 hr 3 hr 2 hr 1 hr
30
1 hr min min
30 15
min min
15
10
min
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