Re: [PSUBS-MAILIST] Miscellanous ideas

["Steven Mills" <barycenter@earthlink.net>]

>From: 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.
>

Well, I didn't think this topic would get any responses beyond
Warren. But let me add one more *possibility* from Warren's
3D engine program along with the collision detection. The
transform engine has possibilities, too.  With some reworking
or modification of the transform algorithms a wavelet transform
engine or signal processor to visual display could be created
from the collision detection data. A discrete cosine transform
engine algorithm, which is a form of a fourier transform [ if memory
serves :-o ] can be used as a basic framework.

--Steve

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> --- 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