OT: Power Supplies

Sam Couter sam at topic.com.au
Thu Sep 19 17:02:09 EST 2002

[ I'm not a doctor or a hearing specialist. ]

Antti.Roppola at brs.gov.au <Antti.Roppola at brs.gov.au> wrote:
> Will low level white noise do that? I thought it was the sound
> pressure that damaged the cilia.

Yes, low level sound over an extended period will also damage your
hearing. The background noise in a server room, for instance.

> I think it is tuning it out. I have a friend whose room was full
> of PCs and he slept happily amongst the buzzing. After he moved them
> out, he kept waking up because of the silence. If he was indeed
> deaf, how would he have noticed the silence?

It takes a while for the damage to occur, and it's not absolute. Less
acute hearing doesn't mean total deafness.

> Industrial deafness (tinnutus) gets you a ringing in the ears rather
> than silence.

There are many different kinds of hearing loss that come under the term
"industrial deafness". Ringing in the ears is one kind. Near total loss
at specific frequencies is another. Partial loss across many frequencies
is another again.
Sam "Eddie" Couter  |  mailto:sam at topic.com.au
Internet Engineer   |  jabber:sam at jabber.topic.com.au
tSA Consulting      |  http://www.topic.com.au/
OpenPGP fingerprint:  A46B 9BB5 3148 7BEA 1F05  5BD5 8530 03AE DE89 C75C
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