Woodworking

Listen Up: How Noise Can Harm Your Hearing




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The good news is that you don't have to lose your hearing as you age. The bad news is, you will - unless you limit your exposure to high noise levels. The most preventable cause of hearing loss is the cumulative effect of noise. The following suggestions and decibel (dB) chart will help you gauge your exposure to noise and reduce your risk of hearing loss:

* Wear ear plugs when operating noisy equipment (i.e. lawn mower, motorboat or power tools).

* Set car, home and portable stereos to below half volume.
Beware of music levels in exercise classes, concerts and bars.

* Look for a product recommended for quiet operation when shopping for a fan, air conditioner or other household appliance.

* Don't buy noisy toys. Some toy musical instruments emit dangerous sound levels, while cap guns and firecrackers, exploding near the ear, can damage hearing even if you only hear them once.

* Any noise which makes your ears ring, a condition called tinnitus, is too loud.

* Protect your ears if you hunt or shoot guns. Acoustic trauma - immediate, severe and persistent hearing loss - is directly linked to gunfire.

* If your workplace is noisy, ensure that ear protectors are provided, and wear them.

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* Make sure printers, copiers and other noisy office
machines aren't grouped together.

* Wear ear plugs at rock concerts.

* Avoid places where you cannot talk comfortably with another person who is three feet away.

* Wear ear protectors for loud hobbies like snowmobiling or woodworking.

How Loud is Too Loud? Use this Decibel Level Chart to Gauge Noise Effects

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Normal breathing, 10 dB - Just audible

Quiet office, refrigerator, 50 dB - Comfortable

Vacuum cleaner, hair dryer, inside a car, 70 dB - Intrusive,
interferes with telephone conversation

Average city traffic, alarm clock, 80 dB - Annoying,
intrusive, interferes with conversation

Electric razor, many industrial work places, 85 dB - Level
at which hearing damage (8 hours) begins

Subway, motorcycle, lawn mower, 90 dB - Very annoying
Average portable cd player set above half volume, 95 dB -
Repeated exposure risks permanent hearing loss

Chain saw, subway train, garbage truck, 100 dB - Damage
after 15 minutes exposure

Inboard motorboat, power saw, highly amplified rock music,
pneumatic drill, 110 dB - Regular exposure of 1 minute risks
permanent hearing loss

Thunderclap (nearby), jet engine (at take off), very loud
nightclub, 120 dB - Threshold of pain

Shotgun firing, air-raid siren, 130 dB - May cause acoustic
trauma

Chart Source: Canadian Hearing Society Foundation

Noise pollution is increasing, with city noise doubling
every decade. However, by limiting the noise that you and
your children are exposed to, you can help protect yourself,
and them, from future hearing loss.

Copyright 2005 Jane Lake

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