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Date: Sat, 28 Oct 1995 23:27:56 -1000 (HST)
From: Richard Pyle <deepreef@bi*.bi*.Ha*.Or*>
To: HeyyDude@ao*.co*
Cc: techdiver@terra.net
Subject: Re: A Question of Gas...


> O.K, all you technical diving dudes - here is a question that I have, which
> is something I'm sure some of you will have the answer to.  My question is
> thus:

[etc...]

> Now, if I use a different "noble" gas (such as Neon) as my diluent, how would
> this affect my voice?  Would it sound deeper than normal, or close to that of
> Helium?

I've done a number of rebreather dives to 230+ feet with a rebreather, 
FFM, and comm gear - just as you've proposed (except the rebreather was 
built by Cis-Lunar, and the comm gear by DiveComm).  On all of these 
dives I had a trimix with a PO2 of 1.4bar/atm, a PN2 of ~4.0bar/atm, 
balance helium.  There was some Donald Duck, but not enough to be 
unitelligible.  In fact, it wasn't a whole lot worse than it would have 
been o**

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