posted on Dec, 20 2011 @ 04:00 PM
As StealthyKat might remember, I once uploaded a recording of the booming sound which I made around three months ago, here on the extreme east of the
UK. I have heard the sound a few times since, but nothing too breathtaking. Then, about 10 days ago, I heard a whole new version of the sound. Again,
I recorded it on my Zoom H2 audio recorder. StealthyKat's new thread has given me the impetus to post it for you all.
This sound is more metallic than the last. It sounds like an enormous drill being used badly. There were more overtones this time and it was a lot
louder than I've ever heard it. It lasted for about half an hour, starting and stopping really abruptly. It was a very windy night here in Gorleston,
Norfolk, that night. No-one reported anything at work the next morning, but then most people I work with live around 20 miles away from here.
Here is about 90 seconds of the sound, out of about 9 minutes I have from that night. In order to be able to amplify the sound (a 17dB boost) I have
had to cut out some sounds where I was scrabbling around to plug in my earphones. Over the last five seconds or so, you will hear my boiler kick in,
which is why I have had to use this relatively unsatisfactory sample. The breathing-type sound is the sound of the wind in the mic. The white
noise-like sound is the sound of the wind in the leaves in an evergreen tree opposite me.
I also selected 0.6 seconds, the clearest bit I had, to try to have a look at which frequencies this sound is built up from. The bars at around 1000
Hz and 2000 Hz look extremely unusual to me:
Here's a frequency analysis of that same 0.6 seconds, just in case it means anything to anyone:
If anyone would like WAV files to do their own analyses, then feel free to message me.