[183971] in North American Network Operators' Group
Re: Ear protection
daemon@ATHENA.MIT.EDU (Karl Auer)
Wed Sep 23 10:14:54 2015
X-Original-To: nanog@nanog.org
From: Karl Auer <kauer@biplane.com.au>
To: nanog@nanog.org
Date: Thu, 24 Sep 2015 00:14:30 +1000
In-Reply-To: <D2281678.1866D%bholloway@pavlovmedia.com>
Errors-To: nanog-bounces@nanog.org
On Wed, 2015-09-23 at 13:48 +0000, Bryan Holloway wrote:
> Depends on the type of "noise" too.
Obviously seek competent medical advice, but my understanding is that
this is a myth.
The energy of sound is what causes damage. Bach played at 120dB will do
just the same damage as a jet engine at 120dB. By reducing the "alarm"
factor - by being more predictable, basically - loud sounds like music
are often easier to tolerate and are often perceived as less loud, but
energy is energy, and energy is damage.
The other factor is time - the longer the sound continues at a given
level, the more damage it does to the hearing.
Here in Australia, 84dB for 8 hours is the highest "dose" that is
legally allowed in the workplace without hearing protection. For sounds
over about 95dB hearing protection is required even for short exposures.
Regards, K.
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