Yep, sounds like that to me too. Owl begging calls.
Kevin
On Aug 2, 2009, at 12:27 PM, Wil Hershberger wrote:
> 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
> > > ***************************************
> > >
> >
> >
> >
>
>
>
>
|