ger
Date: Sun Aug 2, 2009 11:28 am ((PDT))
Sounds like young barred owls begging to me. The fact that it moves
around in the woods when he was looking for it kinda makes one think
that it isn't mechanical and it only occurs in summer.
http://www.natureimagesandsounds.com/assets/mystery-riffert1_compare.wav
This is a comparison of the cleaned up mystery recording and two
different young barred owl begging calls from Florida and Maryland.
Wil Hershberger
Nature Images and Sounds, LLC
Hedgesville, WV
The Songs of Insects
My Blog
On Aug 1, 2009, at 8:02 PM, picnet2 wrote:
> Hi Doug,
> I have extensive knowledge when it comes to identifying mystery
> sounds and jumping to the wrong conclusion.
>
> #1
> As a rough guess it sounds to me like partial cycle from (an
> unknown) reciprocating hydraulic cylinder, the start lasts 137ms,
> followed by the volume being filled , 1100ms, at the end some
> resonance & ringing as the piston rod rubs on the rod gland, or it
> could be from the body / bucket the piston is moving.
>
> Slowing down the recording considerably and filtering allows you to
> analyze it in detail.
> Drift integrating with a beam width of 81ms seems to show a half
> second pulse around 8 Khz, which I suspect is an artifact from the
> recording device.
>
> #2 I thought initially based on the location description it could be
> part of a grain feeder cycle?, worm drive advancing corn / drying or
> processing machinery? - but playing it backwards slowed down,
> indicates a cylinder filling.
>
> A longer recording preferably in stereo may allow a more detailed
> analysis.
>
> BR,
> Mike
>
> caused most likey by the
> --- In Doug Von Gausig <>
> wrote:
> >
> > I've posted a mystery sound that was sent to me by a man in
> Michigan. His
> > explanation of the sound is attached, and I have cleaned it up and
> boosted
> > it a bit for this sample. The sample is at
> > http://www.naturesongs.com/mystery-riffert1.wav . Take a moment
> and see if
> > you know what this might be.
> >
> > Thanks!
> >
> > Doug
> >
> > Location: Midland, Michigan-USA
> >
> > Habitat: We live about 6 miles north of Midland in a rural area.
> We have
> > about 2 acres, with the back half being wooded. Our road is a dead
> end
> > with little traffic and is about half farm fields (corn and field
> grains
> > grown)...there is a small cluster of about 4 houses at the near
> end of our
> > road (including ours)...behind all of our houses is a large woods
> (1/2 mile
> > wide by 2 miles long which is also connected to other woods in a
> fairly
> > continuous stretch that heads into northern Michigan which is
> generally a
> > wooded area). Our local woods are very low lying and are often wet
> (even
> > sometimes in the middle of summer). The area is very quiet (you
> can hear
> > neighbors talking very lowly) and this sound dominates many nights.
> >
> > Time of day: we have only ever heard the sound after dark and
> usually
> > early in the night (approx 10pm to about 1am)...and only in the
> summer
> > (June, July, August)
> >
> > A recording is attached...it is not of great quality as I recorded
> it with
> > a digital camera with a tiny microphone (it is actually a video
> clip, but
> > since it is dark, nothing can be seen)...the clip is about 14
> seconds and
> > the sound is at the end at around 12 seconds. Your volume will
> need to be
> > turned up.
> >
> > The sound is repetitive occurring at about 15-20 second intervals
> for long
> > periods of time (up to hours at a time). On the recording I only
> captured
> > one cycle of the sound being made...sorry). My wife at first
> mistook the
> > sound for a neighbor sawing boards on a table saw of sorts b/c of
> the
> > repetitive nature and the quick ascending noise...reminiscent (to
> her
> > anyway) of a board being quickly sawed. I do not remember hearing
> the
> > noise last year (2008) but definitely heard it in 2007 and this
> year. This
> > is not to say that I did not hear it in 2008, but I sure do not
> remember it.
> >
> > There only seems to be one of the creature making the noise...as I
> am
> > unable to discern another variant. Occasionally, the area the
> sound comes
> > from changes (especially after I went in search of it, it moved
> farther
> > back into the woods).
> > ***************************************
> > Doug Von Gausig
> > Natural Sounds and Photos at:
> > http://naturesongs.com
> > More Photos at:
> > http://www.criticaleyephoto.com
> > Clarkdale, Central Arizona, USA
> > ***************************************
> >
>
>
>
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