Download To protect your hearing, it`s best to limit loudness

Listen up: To protect your hearing, it's best to limit loudness
by Carla Meyer
McClatchy Newspapers
September 15, 2010
Ear buds. Earphones. Naked ears.
How one listens to music does not matter in terms of potential hearing damage as much
as the combination of volume, proximity to the noise source and length of exposure.
This is common sense, yes. But when studies emerge like a recent one in the Journal of
the American Medical Association that estimated one in five teenagers has hearing loss,
the message of auditory moderation seems to bear repeating.
Or perhaps it should be shouted at 79 decibels. That's about the highest level of noise
intensity a person should be exposed to for an extended time, according to Susan
Kaplan, an audiologist with the University of California-Davis health system.
"The louder you like to listen to music, the shorter amount of time" you should listen to
it, Kaplan said. "It doesn't matter if you are 15 or 60." Hearing loss occurs more often
with sound above 80 decibels, or about the noise level of a ringing telephone, Kaplan
said. At 100 decibels (lawn mower, chain saw, approximate maximum volume on an
iPod), things get truly dicey.
Music fans who insist on listening to iPods at 100 percent volume through earbuds those in-ear speakers that seem permanently attached to today's teens - should do it for
only five minutes at a time, Kaplan said. At 80 percent volume, they can go an hour,
Kaplan recommends. At 70 percent to 79 percent, a few hours, and 69 percent and
below, four to five hours.
Earbuds are slightly more dangerous than over-the-ear earphones, Kaplan said, due to
the buds' closer proximity to the cochlea, or auditory portion of the inner ear. "The
farther away you are from the source of the sound, the less impact it will have, even if it
has the same intensity," Kaplan said.
By that token, music lovers who want to hear their favorite bands live as well as
recorded should beware the giant speaker. "If your body is vibrating, then so is your
ear," Kaplan said. She urged fans of live music always to consider ear plugs.
"It sounds dorky, but I do advise it, especially if (people) know they are going to a
concert where the band plays really loud music," Kaplan said. "If you are listening to
James Taylor play acoustic guitar, it is going to be different than listening to KISS."
Kaplan said the soft, foamy earplugs available at most drugstores will do the trick. But
for a Deftones show last month, Carol Gale of Sacramento, Calif., went industrial. "I got
mine from the hardware store," Gale said of the rubber earplugs she bought for the
hard-rock show at cacophonous Memorial Auditorium. "I knew (the Deftones) were
going to be loud. It was the first time I ever wore earplugs, and I was so glad I did."
Gale, a talent manager who co-owned the downtown music venue Club Can't Tell
during the 1980s, has attended rock shows for 35 years. Her hearing is fine, she said,
even though Club Can't Tell "had some of the loudest shows ever." But Gale has
become more careful recently about protecting her hearing. She notices when veteran
musicians she knows cock their heads and favor one ear. She now embraces the idea
of earplugs, and venues that sell them at concerts, like the Crest Theatre. "I wish more
(venues) sold them," she said.
Sacramento guitarist Ross Hammond said he prefers noise reducers designed for
musicians, like the more expensive molded-rubber earplugs sold at music stores.
These earplugs work better onstage, Hammond said, since "foam earplugs can
eliminate an entire frequency, and eliminate some dynamics" of the music.
Kaplan said she has seen musicians with noise-induced hearing loss at the University of
California-Davis audiology clinic. But she has not encountered many teens affected by
high volumes on personal listening devices. That's because their hearing loss might still
be slight enough that they have not noticed it, Kaplan said.
"I imagine that when these teens are middle-aged, we definitely will see a lot more of
them needing hearing aids," Kaplan said.