<html> <head> <style></style> </head> <body class='hmmessage'> Years ago I posted some dB readings I'd made on my own and they are in the ballpark w/those listed. I also practice room readings. <br><br>Scary, very scary...<br><br>Conrad Hoffsommer<br><br><br><br><br><hr id="stopSpelling">Date: Thu, 3 Mar 2011 10:15:02 -0800<br>From: esambell@yahoo.com<br>To: caut@ptg.org<br>Subject: Re: [CAUT] Useful data on loudness<br><br> <meta http-equiv="Content-Type" content="text/html; charset=unicode"> <meta name="Generator" content="Microsoft SafeHTML"><style> .ExternalClass DIV {;} </style><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> <style> .ExternalClass .ecxhmmessage P {padding:0px;} .ExternalClass body.ecxhmmessage {font-size:10pt;font-family:Tahoma;} </style> Ted,<br>  <br> 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>  <br>   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>  <br> 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>  <br> 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>  <br> (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> <hr id="ecxstopSpelling"> 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> <style> .ExternalClass DIV {;} </style> <div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"> <div> <div>Body=<a rel="nofollow" href="http://www.gcaudio.com/resources/howtos/loudness.html" target="_blank">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> </div></div> </div><br> </body> </html>