Tuesday 24 August 2010

Protect Yourself Against Hearing Loss

It's estimated that 10 million Americans suffer with noise-induced hearing loss. In fact, noise is one of the most common occupational hazards today, with as many as 30 million Americans being exposed to harmful noise levels at work.

We register sound through little hairs that vibrate in our inner ears in response to different noises. When these hairs are exposed to a sudden burst of very loud noise or to a steady stream of fairly loud noise, they can get damaged, resulting in hearing loss.

Sound pressure is measured in decibels (dB). Here are some everyday sounds and their average decibel rankings:

SoundDecibels (db) Very faint, rustling leaves5Whisper20Rainfall50Typical speech60Washing machine75Busy city traffic85Hair dryer90Leaf blower, rock concert, chainsaw110Ambulance, jack hammer120Jet plane from 100 feet130Fireworks, gunshot14012-gauge shotgun165

How loud is too loud?

Steady exposure to noise that reaches 85 dB can produce hearing loss. A one-time exposure to very loud noises like a gunshot at 140 dB can also cause hearing loss. Listening to a discman or mp3 player at a standard volume level of 5 for 15 minutes a day is enough to cause permanent damage.

Since it's not practical to walk around with a meter that allows you to measure dB, a good rule of thumb is that if you have to raise your voice in order to be heard by a person who is a couple of feet away, the noise level is considered hazardous.

Another practical measure is to carefully observe for ringing in your ears or if sounds feel flat or dull after leaving a noisy environment. If either of these conditions are present, you were probably exposed to a hazardous level of noise.

If you are exposed to potentially harmful noises at work or home, I recommend that you strongly consider using expandable or pre-molded earplugs. You can find them at almost any pharmacy.

An alternative is to use earmuffs, although they might not provide the same level of protection as earplugs that sit snug in your external ear canal.

If you have children who like to listen to music on their mp3 players or in their cars, please share this article with them so that they're aware of how their choices today may affect them in the future.

For more information about noise-induced hearing loss and what you can do to prevent it, please visit the website for the National Institute for Occupational Safety and Health.

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