Re: [PSUBS-MAILIST] Miscellanous ideas

[Warren Greenway <opensourcesub@yahoo.com>]

You could actually record a signature of a speed boat,
and use a Fourier WaveForm analysis to match the
waveforms and set off an alarm. I don't actually claim
to understand Fourier analysis, but the algorithms
are readily available.

Warren.

--- Michael B Holt <tlohm@juno.com> wrote:
> 
> On Thu, 27 Mar 2003 15:41:20 1100 (UTC) peter 
> mckellar  writes:
> >
> >maybe not a workable idea at present, still its
> more thoughts to 
> >consider.  btw i LOVE the collision detection
> software idea :))
> 
> One idea I've kicked around more than once is a
> hydrophone
> that would listen for certain frequencies and sound
> an alarm
> when they were detected.    What I had in mind for
> this was to
> listen for a sound or sounds that are characteristic
> of all
> outboards.   Since most of us will be operating in
> waters 
> that have lots of outboard traffic, the idea seemed
> a natural
> one.
> 
> I presume the sounds of the lower unit gears would
> be what
> the gadget would listen for.
> 
> 
> 
> Mike
> 
> 
>
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