pers
We also can not dismiss that it is "Greenman" who is making some of
these sounds. Although I am sure that is not always the case.
Greenman is that creature found in art as long as art has been
documented. It is the face in the tree and the voice in the wind.
The human ear and eye both will attempt to make order of complex
unordered sounds and sites. The mind can go to great lengths to
achieve this and the mind will recall and playback sights and sounds
heard in the past.
I am not admitting to insanity when I say that I hear voices in the
woods. I see objects too that do not exist. I even have been touched.
All of these things when they happen I often blame on Greenman. I
find Greenman to be most active in those twilight times when grays
slowly change to color and I am sitting quietly straining to hear and
see. I enjoy Greenman.
Rich Peet
--- In "Randolph S. Little" <> wrote:
> NatureRecordists:
>
> Hope I'm not the only one who is finding this thread to be quite
productive;
> if so, please advise and I'll not pursue it further on this forum.
>
> Walter Knapp's latest reply finally sparked what I think is a
highly likely
> hypothesis. Whereas, with a single sound source something like
multi-
> pathing can create the reported effects (e.g., ghosts on a TV
image), if
> there are multiple sources at similar frequencies then the effects
of
> constructive/destructive summation are inevitable (e.g., beats
between
> engines on any multi-engine aircraft). No non-linearity is
required. This
> is a simple consequence of convergence of multiple acoustic waves,
> and affects the instantaneous sound pressure level at the microphone
> just as at our ears. And the effect is not amplitude dependent in
the
> sense that overload distortions are.
>
> This multi-source interference is not often encountered in any
birds that
> I have typically recorded, but it is certainly a fact of acoustic
life in
> many
> other situations such as vocalizing choruses of insects and amphibs.
>
> Mea culpa; I should have thought of this hypothesis much sooner.
>
> Good recording,
> Randy
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