Re: Yet another mystery sound

["hartogj" hartogj]

Hi Paul,
Nice sounds! 
It is the wings of a bird flying by - a duck I'd guess. 

John Hartog

--- In  "PaulD" <> wrote:
>
> While recording in the Big Island Lake Wilderness area of the Upper Peninsula 
> of Michigan, this very unusual sound popped up. At first, I thought it was RF 
> interference, but the nearest broadcast facilities were 18 miles away in 
> Munising, plus the sound has an airy quality, and comb filters as it travels 
> from left to right. It sounds airborne.
> 
> http://tinyurl.com/2fcuhlb
> 
> Time: approx 11:00 PM, 6/20/10. Location: thicket on the shore of a small 
> glacial lake surrounded by middle-aged maple/birch/poplar/evergreen forest.
> 
> Any thoughts as to its source would be most appreciated.
> 
> Thanks!
> 
> Paul Dickinson
>