Re: curious on ultrasounds

["Ted Coffey" twcoffey1]

Since it is synchronous with the cricket sound it most likely is
coming from the cricket.  Sounds generated by rubbing (for example:
your two finger together) will produce ultrasonic frequencies.
Ted

--- In  "dobroide" <> wrote:
>
>
> noticed a series of ultrasonic calls in a recording I did the other day
> at dusk in a scrub/juniper area near Donana, S Spain.
>
>   sound sample
> <http://freesound.iua.upf.edu/samplesViewSingle.php?id=3D37231>
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>   spectral view
> <http://farm2.static.flickr.com/1034/761823513_33cf92597c_o.jpg>
>
> 15-21 kHz (and above, obviously), they are strong and show a pattern. At
> first I thought of a bat, but maybe they were done by an insect (?).
> Similar calls appear often during summer so  I would appreciate any
> hint.  Just curious.
>
> Regards
>
> D.
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