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Teens and Hearing Loss
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| Wednesday, August 25th, 2010 | | CWK Producer |
“It's very bad to keep the MP3 player at high blast, because you really can be damaging your hearing. A good rule of thumb is if you can't hear people talking to you while you are wearing your ear buds, or if people can hear your music while you are wearing your ear buds, then it is definitely too loud.”
– Julie Zweig, M.D., Ear, Nose and Throat Specialist
Nearly 1 in 5 American adolescents has some level of hearing loss, a rate that has climbed substantially over the past two decades, according to a study done by researchers at Boston's Brigham and Women's Hospital, reported in the Journal of the American Medical Association. Ipods and other digital music players have skyrocketed in popularity and sales. How much of this constant loud music through earbuds or headphones can lead to hearing loss?
16-year-old Hayden likes to pump up the volume on his iPod.
"I listen to it as loud as I can," says Hayden, "to drown out my surroundings, pretty much."
But afterwards, he says, it's hard to hear.
"It's kind of like, something's in there almost," explains Hayden as he puts a finger to his ear.
Other kids notice the same thing.
"Sometimes my ears ring," says 14-year-old Wesley. "They feel like they itch a little bit."
The study published in the Journal of the American Medical Association reports that almost 20 percent of teens between the ages of 12 and 19 have some form of hearing loss – a 30 percent jump from the late '80s and '90s. Some of that loss may be from MP3s.
One big risk, experts say, is turning up the volume too high.
"It's very bad to keep the MP3 player at high blast because you really can be damaging your hearing," says Dr. Julie Zweig, an Ear, Nose and Throat specialist. "A good rule of thumb is if you can't hear people talking to you while you are wearing your ear buds, or if people can hear your music while you are wearing your ear buds, then it is definitely too loud."'
Another problem, she says, is duration. "You have to remember that damage to the hearing occurs not just from listening to the MP3 players at high volumes," says Dr. Zweig, "but [from] how long you listen to them - the duration of use."
She says once a teen has ringing in the ears or muffled hearing, it's possible that damage has already occurred. "Hearing loss is a big deal because you can never get your hearing back," says Dr. Zweig, "You can wear devices that help your hearing, such as hearing aids, but once you lose your hearing, it's gone."
She says parents should be aware there is a maximum volume lock on their child's iPod. It's a safeguard for teens that won't turn down the volume on their own.
What We Need To Know
Researchers have found that exposure to loud sounds can lead to noise-induced hearing loss (NIHL). Researchers tested the hearing of over 5,000 children ages 6 to 19 years and found that 12.5 percent of the children had evidence of a NIHL. Using their data, the researchers estimated that approximately 5.2 million children in the United States have a NIHL in one or both ears, and boys appear to be affected more often than girls.
NIHL occurs when the ears' sensory cells and nerve fibers are damaged by exposure to loud sounds. If these cells and fibers are destroyed, hearing loss is permanent. According to the National Institute on Deafness and other Communication Disorders (NIDCD), NIHL can be caused by a one-time exposure to a loud sound as well as by repeated exposure to sounds at various loudness levels over an extended period of time.
Symptoms of NIHL caused by repeated exposure increase gradually and may include:
- Vague feelings of pressure or fullness in the ears.
- Sounds becoming distorted or muffled.
- Difficulty understanding speech.
- A ringing sound in the ears when in a quiet place.
NIHL due to repeated exposure is cumulative. If damage continues, hearing declines further.
The loudness of sound is measured in units called decibels. Conversational speech is generally 60 decibels. The noise caused by traffic can be around 80 decibels. Louder noises, such as a motorcycle or firecracker, can range from 120 to 140 decibels.
The NIDCD says that sounds of less than 75 decibels, even after long exposure, are unlikely to cause hearing loss. Generally, if you have to shout to be heard above the noise, or if you can't understand someone who is speaking to you from less than two feet away, the noise around you is too loud.
In addition to being aware of the noise level around you, experts at the American Speech-Language-Hearing Association (ASHA) urge parents to consider the level of noise a child's toys can make. Many toys, particularly when held close to the ear, emit damaging levels of noise. Cap guns, vehicles with horns and sirens, walkie-talkies, and even musical instruments are capable of being too loud. ASHA recommends that parents listen to a toy before purchasing it and to check toys already at home.
NIHL can be prevented. The NIDCD urges all individuals to understand the hazards of noise and how to practice good health in everyday life. Consider the following:
- Know which noises can cause damage (those above 75 decibels)
- Wear earplugs or other hearing protective devices when involved in a loud activity
- Protect children who are too young to protect themselves
