Thomas,
That's an interesting question. Although we can sense audio waves in
these frequencies I don't know that we are aware of any creature
sensing electromagnetic waves at these frequencies. At much higher
frequencies we sense the waves as light and, a bit lower in the
frequency scale we sense infrared as heat. There are birds that see
ultraviolet electromagnetic radiation. But the world of nature is
strange and there is much we don't understand. Pigeons seem to sense
the magnetic forces of the earth as do some other creatures. It will
be fascinating to watch future research and see if any creatures sense
these slow radio waves, and if so, how and why they do so.
Kevin
On Feb 9, 2009, at 11:59 AM, picnet2 wrote:
> Hello Thomas,
> Fascinating, Im not sure of mammals are able to detect RF in the VLF
> range
> - perhaps the RF would first need to interact with something to
> transduce to audio which
> whales etc may be able to detect. I checked the wav file in
> baudline, shifting the tones
> down makes for quite an irritating sequence.
>
> Nice to see the R09HR material :)
>
> BR,
> Mike.
>
> --- In Thomas Ashcraft
> <> wrote:
> >
> >
> >
> > I am building a very low frequency ( radio ) receiving system for
> > monitoring natural spherics and for the possibility of receiving
> direct
> > emissions from meteors.
> >
> > As I tune in acutely I find I am receiving transmissions from
> something
> > called the Russian Alpha navigation system. Info here:
> > http://www.vlf.it/alphatrond/alpha.htm
> >
> > These transmitters broadcast constantly at around 11-14 kHz. I am
> > wondering if marine sealife ( like whales for example ) can hear
> these
> > signals naturally?
> >
> > I posted a sample webpage here with audio of the signals. The
> signals
> > are very faint patterned tones so you might have to turn your
> speakers
> > up high to hear them.
> > http://www.heliotown.com/VLF_Alpha/20090207_Ashcraft.html
> >
> > I have no idea if sealife can hear this stuff as I am just
> pondering.
> > But I must say that the constant high pitched signals like these
> might
> > be irritating if an organism had to hear them all the time without
> > escape from them.
> >
> > Thomas Ashcraft
> > New Mexico
> >
>
>
>
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