Over the past three or so years, several papers have been published on
a wide range of extraneous noises generated by wind turbines, Doug.
Some, very low frequency "thumps" that have caused grand mal seizures
and other serious maladies downwind and caused property values in some
places to drop to near nothing. In other cases, because of unique
couplings to the terrain and other acoustic factors have generated
very strange low mid-range signals that are, as of yet, unexplained.
Altho, what you posted doesn't fit into any of those descriptions.
Bernie
On Aug 1, 2009, at 9:38 AM, Doug Von Gausig wrote:
> I'll ask! Do wind turbines make such a sound?
>
> Doug
>
> At 09:24 AM 8/1/2009, you wrote:
> >
> >
> >Were there any wind turbines within a mile or so, Doug?
> >
> >Bernie
> >
> >On Aug 1, 2009, at 8:54 AM, 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>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>http://naturesongs.com
> > > More Photos at:
> > > <http://www.criticaleyephoto.com>http://www.criticaleyephoto.com
> > > Clarkdale, Central Arizona, USA
> > > ***************************************
> > >
> > >
> > >
> >
> >Wild Sanctuary
> >POB 536
> >Glen Ellen, CA 95442
> >707-996-6677
> ><http://www.wildsanctuary.com>http://www.wildsanctuary.com
> ><chirp%40wildsanctuary.com>
> >Google Earth zooms:
> ><http://earth.wildsanctuary.com>http://earth.wildsanctuary.com
> >SKYPE: biophony
> >
> >
> >
>
> ***************************************
> Doug Von Gausig
> Natural Sounds and Photos at:
> http://naturesongs.com
> More Photos at:
> http://www.criticaleyephoto.com
> Clarkdale, Central Arizona, USA
> ***************************************
>
>
>
>
Wild Sanctuary
POB 536
Glen Ellen, CA 95442
707-996-6677
http://www.wildsanctuary.com
Google Earth zooms: http://earth.wildsanctuary.com
SKYPE: biophony
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