Posted by: Jensen Hearing | December 5, 2014

Dangerous Decibels

Decibels are a measurement of sound just as inches and feet measure distance. According to NIOSH (National Institute for Occupational Safety and Health) 85 decibels (dBA) is safe for up to 8 hours. That is 8 hours over a 24-hour period. That means that you can be working in a factory or other occupation where the noise level is 85dBA for 8 hours and most people will be fine. But if you then go to the shooting range or dancing at loud club, or go into your workshop after work, you add more noise to the equation.

For every additional 3 dBA your safe listening time is cut in half. That means, if the sound is 91 dBA you have just 2 hours of relatively safe listening time per 24 hours. (Don’t worry about the “A”, it just gives a more actuate reading of the sound)

So what is 85dBA anyway? 85dBA is the sound of a busy street corner. Next time you are standing at the busy city street corner, listen to the sound. That is about 85dBA. 91dBA is the sound level of a gas lawn mower. A band saw is about 98dB when measured at the ear drum.



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