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<br />Noise Center: Decibel Levels <br /> <br />Page 1 of3 <br /> <br /> <br />New York: <br />5Q 6roaclwlIy,6tlJflool.,Ne""y or'., NY 10004 <br />917-305-7700 (Voice) .917-305-7999 (TTY). 917-305-7888 (Fax) <br /> <br />Florida: <br />280J}_W,QJ}klamLPa rlLB1vd~_,-S uite3M,-Qakh1n(;LPJ}xk.,J<L.33311 <br />954-731-7200 (Voice)' 954-731-7208 (TTY)' 954-485-6336 <br /> <br /> <br />NOISE CENTER OF THE LEAGUE <br /> <br />1888 NOISE 88 <br /> <br />NOISE LEVELS IN OUR ENVIRONMENT FACT SHEET <br /> <br />How Loud is Too Loud? Experts agree that continued exposure to noise above 85 dBA <br />over time, will cause hearing loss. To know if a sound is loud enough to damage your ears, <br />it is important to know both the loudness level (measured in decibels, dBA) and the length <br />of exposure to the sound. In general, the louder the noise, the less time required before <br />hearing loss will occur. According to the National Institute for Occupational Safety and <br />Health (1998), the maximum exposure time at 85 dBA is 8 hours. At 11 o dBA, the <br />maximum exposure time is one minute and 29 seconds. If you must be exposed to noise, it <br />is recommended that you limit the exposure time and/or wear hearing protection. <br /> <br />Measure Up and Turn it Down: Decibel Levels Around Us The following are decibel <br />levels of common noise sources around us. These are typical levels, however, actual noise <br />levels may vary depending on the particular item. Remember noise levels above 85 dBA <br />will harm hearing over time. Noise levels above 140dBA can cause damage to hearing after <br />just one exposure. <br /> <br />Points of Reference *measllred in dBA or decibels <br /> <br />. 0 The softest sound a person can hear with normal hearing <br /> <br />. 10 normal breathing <br /> <br />. 20 whispering at 5 feet <br /> <br />. 30 soft whisper <br /> <br />1- <br /> <br />http://www.lhh.org/noise/decibel.htm <br /> <br />2/23/2005 <br />