After the webpage sound drives you crazy,turn it off at the bottom left of this page:))
I remember what really interested me in radio since I was a teen.The weird alien like sounds you would hear.I will put some links below to help some of you identify those weird noises.
http://www.milspec.ca/modems/modems.html
http://www.kb9ukd.com/digital/
http://www.astrosurf.com/luxorion/qsl-audiofiles
http://www.ominous-valve.com/uteworld.html
http://mt-milcom.blogspot.com/2007/11/milcom-hf-frequency-list.html
I hope these sites help some of you to finally understand some of the sounds you wondered about. Good luck decoding some of them.
> I never figured out what this was.
> You ever see the movie SIGNS?Listen carefully,oddly similiar.:) (the scratchy noises) The other sound is a nearby broadcast station.