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Start Dancing Atlanta
Protect Your Ears

There has been a dance party or two that I have left early because of the over loud music being played. At one dance party I actually measured a general loudness of over 100 dBa slow response C. The OSHA guideline allows for a maximum exposure of 2 hours a day to 100 dBa. At 102 you are limited to 1.5 hours and at 105 dBa, one hour. I read peaks of over 105 dBa at that party.

You can use ear plugs to reduce the exposure to your ears. If you leave a dance and your ears are "ringing", then you have been exposed to excessive loudness.


More information:
Exposure to loud noise is the second most common cause of hearing loss. Approximately 30 million Americans are exposed to high intensity noise in their workplace (1,2) in one in 4 of these workers (or 7.5 million Americans) a permanent hearing loss will develop (1,2). Much can be done to prevent noise-induced hearing loss but little can be done to reverse it. Sometimes a single exposure to loud noise is all that is needed, a single hunting trip without ear plugs. Loud noise damages the hair cells in the inner ear and can cause hearing loss, ear ringing and distortion of sounds. (http://www.oshax.org/info/articles/decibel-levels)
Decibel Levels of Environmental Sounds
Source--Dangerous Level				dBA SPL

Produces Pain 					120-140

Jet Aircraft During Takeoff (at 20 meters)	130
Snowmobile	- Tractor Without Cab		120
Rock Concert					110

Die Forging Hammer
Gas Weed-Whacker
Chain Saw
Pneumatic Drill					100-105

Home Lawn Mowers				95 to 100 dB

Hearing Safety
Predicted Hearing Loss from Exposure
 OSHA

TABLE G-16 - PERMISSIBLE NOISE EXPOSURES (1)
______________________________________________________________
                                           |
 Hours per day  | Sound level dBA slow response
______________ _|_________________________________
                |
8...............|                    90
6...............|                    92
4...............|                    95
3...............|                    97
2...............|                   100
1 1/2 ..........|                   102
1...............|                   105
1/2 ............|                   110
1/4  or less....|                   115







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