Not sure what animal this is. Perhaps a Homo sapiens in a behavioral activity
referred to as "snoring".
Sent from my iPhone
> On Oct 15, 2013, at 12:02 AM, <> wrote:
>
> I don't know if anyone will be able to help me with this, but I thought I
> would give it ia shot.
>
>
> I was our recording some frogs for the Texas Amphibian Monitoring program
> last night and I once again recorded something strange that I have recorded
> before on occasion. Once in a while when recordings Anurans at night here in
> Texas, I will record a high pitched downward slurring call that is clearly
> not an amphibian. It is also not audible to me while recording but shows up
> clearly in the spectrogram.
>
> It is usually a series of descending calls somewhere from around 14 Khz down
> to about 11 Khz. I don't believe it is an insect because it is too
> sporadic. I will only record it once or twice in a 5 minute recording sample
> at most.
>
> I know the calls of all the local amphibians so I know it isn't that. I am
> just wondering if anyone has any ideas what it could be.
>
> You can see the sample spectrograph here
> http://www.pbase.com/sandboa/image/152879059.jpg. The frogs are Spotted
> Chorus Frogs whose calls are focused around 3Khz. But above this I captured
> the descending call.
>
> And in case you wanted to hear it, I brought it down a more audible range of
> around 3-4Khz and you can hear that transposed version here -
> http://www.birdsandherps.com/sounds/high_pitched_sound.mp3
>
> Anyone have any ideas? Bat?
>
> Thanks,
>
> Chris
>
>
>
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