Subject: RE: Ear plugs and more ...
From: Matt J. Ingalls (ingalls@mills.edu)
Date: Wed Oct 04 2006 - 23:57:28 EDT
http://www.hearnet.com/at_risk/risk_aboutloss.shtml
On Wed, 4 Oct 2006, Kevin Austin wrote:
>
> Source??
>
>
> Best
>
> Kevin
>
>
>
>
> At 10:51 AM -0700 06 10 04, Matt J. Ingalls wrote:
>>> 100dB=2hours, 110=20min, 120dB=7.5min, etc, (time halved for
>>> every 5 dB increase)
>>
>> sorry typo - should be 110=30min
>
>
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