<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>You are right Diane; the figures looked a bit too pat to me too, but they at least provide a simple overview <br><br>Ted<br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Diane Hofstetter <dianepianotuner@msn.com><br><b><span style="font-weight: bold;">To:</span></b> College and University Technicians <caut@ptg.org><br><b><span style="font-weight: bold;">Sent:</span></b> Thu, March 3, 2011 1:06:38 PM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [CAUT] Useful data on loudness<br></font><br><meta http-equiv="x-dns-prefetch-control" content="off">
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Ted,<br>
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The noise figures you posted are interesting, but do not tell the whole story. It is important to know the facts to adequately protect yourselves.<br>
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OSHA's requirements are politically correct, not scientifically correct. Big businesses screamed about noise controls and had powerful lobbyists in Washington. 8 hours at 90dB WILL cause hearing damage to a goodly portion of the population. <br>
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The rest of the world starts at 85dB and uses a 3dB exchange rate. (8 hours at 85dB, 4 hours at 82dB, etc.) even that exchange rate will allow a small percentage of the workforce to acquire noise induced hearing loss.<br>
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When something sounds twice as loud at an increase of 10dB, the sound pressure level--the force of the pressure waves hitting your eardrum--already doubled in intensity at 6dB. We just don't experience the doubling until 10dB.<br><br>Diane Hofstetter, OHC, AAS-HIS<br>
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(Occupational Hearing Conservationist, Associate of Applied Science-Hearing Instrument Specialist)<br><br>
PS: Just last month NIOSH, the federal government's branch that deals specifically with noise controls in industry, backed down from last-year's promises to NHCA (National Hearing Conservation Association) to tighten the laws regarding engineering controls for noise protection in the workplace.<br><br> <br>
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Date: Wed, 2 Mar 2011 21:19:44 -0800<br>From: esambell@yahoo.com<br>To: caut@ptg.org<br>Subject: [CAUT] Useful data on loudness<br><br>
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<div>Body=<a rel="nofollow" target="_blank" href="http://www.gcaudio.com/resources/howtos/loudness.html">http://www.gcaudio.com/resources/howtos/loudness.html</a></div><br>I don't know if this has appeard on the list before, but I think it is very enlighyening.<br><br>Ted Sambell<br></div></div><br> <meta http-equiv="x-dns-prefetch-control" content="on"></div></div>
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