Ok doke. First off, I should say that I have some ideas as to what this is, but none are 100% plausable... no, not even 75% plausable according to modarn science.

Yesterday (May 6th) at 5:38pm, pacific daylight time, I was outside in my yard recording birdsongs. Well, actually I was experimenting with EVP but was stopped in my tracks when I played back the first recording... no more than 5 seconds in, a very odd pulse of static was recorded, with rhythmic ticks. This was recorded with a Macbook OSX 10.4, standard built in Mac mic. I was out in the yard as above mentioned... no underground or overhead power-lines near by. Did I mention that I heard nothing when it was recorded, and only when played back does it sound like.... well, something out of a sci-fi movie. More on my theories later.

This "pulse", if you can call it that, lasts about 3 seconds. Repeating at EXACTLY 66 beats per minute (slightly over one second apart) are clicking noises. (I used a computerized metronome in my audio program to determine this.) Interlaced between these three pulses is modulating static.... between the first and second blip, it is constant with only a little variation beginning to end.. Between the second and third, however, the level of static suddenly pulses; it gets louder, no noise, then shrinks. Then a similar amount of static, and the third blip. after that there is a bit more static, and then it stops.

At first, I thought it was simply feedback from my computer... but with underlaying blips of noise? And in such a uniform pattern? Crazy! And also it has never happened before. So not my computer.


Environmental? Well, last time I checked no bird or insect makes a noise like that... I did not hear it. Radio wave pulse? That's what I thought initially; a radar sweep of sorts. But.... COMPUTER MICROPHONES SHOULD NOT PICK UP RADIO WAVES... should they? That would defy all logic! I read somewhere that electromagnetic interference can cause static... so perhaps an electromagnetic pulse of sorts? If so, why is my computer not fried? Could it be electromagnetic (as in electric and magnetic fields) communication of sorts? ET call home!

So that got me thinking. When you listen to it a few times, it sounds VERY much like a sonar or radar... has an electromagnetic sonar been invented? Is there someone studying the topography of where I live with technology I have never heard of?

So anyhow, here are some pictures I took of the level of the pulse... the first one is the metronome layerd with the blips and the second is the level of the pulse. and here is a linky to the sound file: http://htmltutorial.lnct.org/Sound.mp3 *note* the first bit is the pulse, and then the next five or four bits are the same thing, but with different levels of clean-up and pitch changes applied.

Any ideas and suggestions or questions much appreciated!!!