Ah! The unparalleled tranquility that means
you don’t have to listen to One Direction anymore. Headphones do bring some
welcome peace and quiet to your household and most teens enjoy listening to
music on their smartphones, but when music is played too loudly through
headphones, it can result in permanent hearing loss.
According to a
study by the Journal of American Medical Association, hearing loss in teens is
“30% higher than it was in the ’80s and ’90s”. The study estimates that about 1
in 5 (that’s 6.5 million) US teens suffer some hearing loss from listening to
loud music on their headphones.
While you may feel like your hearing is
being damaged when your children turn up the volume, you are far safer than
when music is played loudly through a headset. The proximity of the transducers
to the eardrums is what poses the danger here. Hearing is made possible by tiny
hair cells in the cochlea that convert vibrations into electrical signals that
travel to the brain. These tiny hairs naturally die out as we age, but can be
permanently damaged by too much vibration.
Loud music (or other noise) can result in
two kinds of damage. Sensorineural damage occurs in the inner ear when hair
cells are negatively affected by loud noises. Each group of hair cells is used
to hear a particular frequency of sound. When they die off, that frequency can
no longer be heard. High frequency hair cells are the most sensitive and they
are the first to succumb to damage. This means that most adults can’t hear
frequencies between 3 kHz and 6 kHz.
You can test which frequencies you can no
longer hear by following this link. http://digg.com/video/how-good-is-your-hearing.
Tinnitus is a more serious condition in
which the hair cells suffer permanent damage. Here the hair cells register
vibrations even if there is no sound which results in a persistent buzzing
sound.
How
loud should headphones be?
Here are the recommended daily doses of
sound that the ear can safely manage.
90 dbA 8
hrs
92 dbA 6
hrs
95 dbA 4
hrs
97 dbA 3
hrs
100 dbA 2 hrs
102 dbA 1.5 hrs
105 dbA 1 hr
110 dbA 0.5 hr
115 dbA 0.25 hr or less
Encourage your children to practice caution when
they are playing music loudly. While it may be okay for very short periods of
time, it could result in damage or permanent hearing loss. Listening to loud
music while walking, biking or driving can compromise your ability to pick up
dangers in your surrounding environment. As a general rule, advise your kids to always
keep volumes below 70%.picture:
Maddercarmine