Re: [PSUBS-MAILIST] Hydrophone systems

[irox <irox@ix.netcom.com>]

One day, when I have time (hahahaha) and submarine (oh please let me
have submarine one day), I will play with this project:
  http://hasas.sourceforge.net/overview.html

Maybe my submarine will need an IT officer for running server farm
to process signals. ;)  If it was a quiet glider sub, this could work
very well.

Cheers,
  Ian.

-----Original Message-----
>From: Joseph Perkel <joeperkel@hotmail.com>
>Sent: May 10, 2007 2:44 PM
>To: personal_submersibles@psubs.org
>Subject: [PSUBS-MAILIST] Hydrophone systems
>
>
>Peter and others,
> 
>When I was considering a war-boat replica, I had gone as far a acquiring plans for a homemade directional hydrophone. http://www.digitalmarketingusa.com/hydrophone.html
> 
>There are a number of commercial, albeit expensive units that are off the shelf such as http://www.sonotronics.com/html/products/receivers/mantrak.html
> 
>The idea being that one could mount such a device atop a short shaft through a simple rotating thru hull. One could have a fixed compass rose on the inside with the bow of course aligned
>@ 360 deg, in order for the operator to determine and call out bearings.
> 
>When I was diving, I was fairly certain within.... I would guess a 90 deg swath of the direction of props to try to keep myself from being blended. This is with human ears so I am quite sure these units will get that down to the degree.
> 
>If you really want to get fancy, there are software programs available that will determine range based upon density and sound wave propagation. This could be run on a Panasonic "Toughbook".
> 
>Joe
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