Referring back to this post
that I made, I decided to compare the sounds
in this thread's video to the sounds heard in this other video
which I recall being featured in
another "strange noise" related topic here on ATS.
Now, I must again stress that I am not an audio professional, and I could be wrong. And I also want to stress that I am highly skeptical of this
phenomenon and its implications/origins, so this should not be construed as an endorsement or agreement with any given hypothesis or speculation
surrounding these sounds. But what I'm hearing sounds remarkably
similar to my ear.
Again omitting as much dialogue as possible, and just isolating the frequencies where the noise sounds the most audible to me, brings me once more to
1199Hz - 1226 Hz, and what I again suspect may be low frequency noise between 0Hz and 378Hz. And the sound is, as I say, remarkably similar. At least
to my ear. You can listen here:
And you can compare it to the isolation of this topic's sky sounds in my previous post here: www...
They aren't identical - the new one I've added has much more low frequency noise/rumble to it (0Hz - 378Hz instead of just 378Hz) but the similarity
is striking in my opinion.
This leads me to strongly suspect (though I can't assert that with any certainty or authority) that at least some
of these rumbling noises (not
as convinced with the metallic, shrieking noises that have appeared more recently) are the same sound, or at least a related phenomenon. I think given
this, it may be time to start asking: what are some natural or man-made phenomena that we know make sounds audible primarily at these frequencies? Is
there a probable average audible frequency associated with ducting (the explanation sometimes given by NOAA for these sounds) for example, or does it
depend on the audible frequency of the thunder from which the audible ducting sounds originate? Etc.
Hopefully this will be useful, although I feel being physically present with audio recording equipment at the time of one of these events would be
more precise than trying to isolate frequencies in a YouTube video.
edit on 1/30/2012 by AceWombat04 because: Added link and
edit on 1/30/2012 by AceWombat04 because: Ditto