Hello Thomas,
Fascinating, Im not sure of mammals are able to d=
etect RF in the VLF range
- perhaps the RF would first need to interact with something to transduce t=
o audio which
whales etc may be able to detect. I checked the wav file in baudline, shift=
ing the tones
down makes for quite an irritating sequence.
Nice to see the R09HR material :)
BR,
Mike.
--- In Thomas Ashcraft <> wro=
te:
>
>
>
> 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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