This is so cool! I can definitely see this overlayed with some football video and not noticing anything (although I wonder how hard it would be to isolate the whistle from background noise... I guess isolating that frequency wouldn't be that hard)

I know it sounds silly, but I sort of wish he posted what the pea whistle sounded like without any encoded data, just for reference. I know we've all heard a pea whistle, but I still would like to play both sequentially and try to see if I detected a difference.

Thanks, I've added the original sound file now.

oops, and I got the gender wrong... your blog is the bees knees!