Inhoudsopgave
Advertenties
English
Listen Responsibly
To avoid hearing damage, make sure that the volume on your
music player is turned down before connecting your headphones.
After placing headphones in / on your ears, gradually turn up the
volume until you reach a comfortable listening level.
Noise levels are measured in decibels (dB), exposure to any noise
at or above 85 dB can cause gradual hearing loss.
Monitor your use; hearing loss is a function of loudness versus time.
The louder it is, the less time you can be exposed to it. The softer it is,
the more time you can listen to it.
Physiology of the Ear and Hearing
Malleus
Incus
Auditory Canal
Tympanic
Membrane
Stapes
For additional information on what loud noises do to your ear and chart reference
http://www.abelard.org/hear/hear.php#loud-music
Cochlear Nerve
Cochlea
Vestibule
To Nose/Throat
This decibel (dB) table compares some common sounds and shows
how they rank in potential harm to hearing.
SOUND
NOISE LEVEL
(dB)
Whisper
30
Quiet Office
50–60
Vacuum Cleaner,
70
Hair Dryer
Food Blender
85–90
Garbage Truck,
100
Cement Mixer
Power Saw,
110
Drill/Jackhammer
Rock Concert
110–140
(varies)
*Chart information obtained from http://www.nidcd.nih.gov/health/education/teachers/pages/common_sounds.aspx
EFFECT
Very quiet
Comfortable hearing levels
are under 60 dB
Intrusive; interferes with
telephone conversations
85 dB is the level at which
hearing damage (8 hrs.) begins
No more than 15 minutes
of unprotected exposure
recommended for sounds
between 90–100 dB
Regular exposure to sound over
100 dB of more than 1 minute
risks permanent hearing loss
Threshold of pain begins
around 125 dB
3
Advertenties
Inhoudsopgave
