Re: [PSUBS-MAILIST] Sound Absorption

["Dan H." <jmachine@adelphia.net>]

Marten,

I haven't got me sub wet yet but the thrusters are up and running.  My three
thrusters are in pods on the exterior of the hull.  Of course I can hear
them in the sub but they're not loud.  If you had a hydraulic pump running
all the time I'm sure that would get annoying.

I like the idea of hearing noises through the hull.  You can't see
everything around you all the time.  Hearing a noisy boat in your vicinity
before you surface is a good thing!

Besides, sound abatement materials against the hull is a place to trap
moisture.

Dan H.

BTW. "Persistence" is now yellow.  I finished the paint job last week.
Tomorrow the trailer will be blue.


----- Original Message -----
From: "Marten Liebster" <mliebster@tbteam.com>
To: <personal_submersibles@psubs.org>
Sent: Wednesday, April 28, 2004 2:50 PM
Subject: [PSUBS-MAILIST] Sound Absorption


>
> Hi,
>
> I am in the initial process of designing a psub, my first. The web site
and
> mailing list have to proven to be chock full invaluable information to me.
> One thing that I haven't seen much about (perhaps I'm searching on the
wrong
> keywords) is that of sound absorption.
>
> I'd imagine that a psub could be a noisy place, with all of the motors,
> pumps, hydraulic and other equipment. It seems to me the hull would
reflect
> back the sound waves, it being bare metal in a tube-like shape.
>
> Questions:
> Is your psub a noisy place?
> Do you use anything on the hull to absorb the sound?
>
> Thanks,
> Marten Liebster
> A psub newbie
>
>