I took the barnacle recording from shadowshian and run them through my spectrum analyser. I don't expect anything to be gained from it, just did it because I can ^^
What you can see here is a snapshot of the noise at the 10 second mark. Looks like very specific frequencies in a short burst.
Peaks seem to be at roughly 27.84Hz, 41.71Hz, 55.68Hz, 69.65Hz, 84.03Hz, 96.93Hz, 110.56Hz, 125Hz, 138.8Hz, 151.91Hz, 166.85Hz. Then nothing that stands out, and another one at 363.91Hz, 853.13Hz and 1029Hz.
Hey, maybe they are coordinates? Not the last three, obviously.
Looks pretty. Better view of the spectrogram:
He send me the recording via dropbox and I hesitate to post the link here. But if he reads this, maybe he can make the file available for everyone. Unless he already did, thread is moving fast. ^^