[PROCON]

[BigCinBigD]

Sorry. I had Taco Bell that day.

[uglybiker]

What IS this strange sound from the sky?

[Pete from Shawnee Mission]

Steve Roach - Cloud Motion

https://www.youtube.com/watch?v=KL9HXNQmBIg&index=17&list=PLcU9W0o81LpNna-TqWcKiMiJM0rg6-ABx

(To cleanse the ears!)

[MarMema]

Junk we left in space making noise as it passes overhead.

[fso301]

Pipes resonating

[redfreedom]

My first thoughts when hearing the sounds is the movie “Close Encounters of the Third Kind” when they were trying to communicate with sounds and a light board.

[TurboZamboni]

https://www.youtube.com/watch?t=15&v=ELr5eD6JZiA

[terycarl]

I think that it is my neighbor kid learning to play the trumpet....people in China are highly disturbed!!!

[factoryrat]

It’s the mating screech of the yellow-bellied barking moonbat, calling to the man-bear-pig, or just the wind whistling through your average liberal’s ears.

[Rodamala]

[Tolerance Sucks Rocks]

DANG!

[Oatka]

I first got a belly-laugh out of a recently seen bumper sticker. Now I’m getting worried.

“God’s back, and boy, is he MAD!”

[<1/1,000,000th%]

You have to be asleep to hear it?

[McGruff]

Does it sound like this?

[trebb]

With all the earthquakes and other activities, it’s probably just the Earth farting...

[M Kehoe]

Not in the first 50 replies...

HAARP.

5.56mm

[NorthMountain]

It’s not aliens.

It’s just Tom Turner.

[GraceG]

It is the cloaked UFOs spooling up their Faster Than Light drives... either that or “Project Blue Beam”....

/sarc

[Nowhere Man]

I'm fascinated by this as well as a bit aloof but if we can consider more mundane sources, I have a few ideas. I'm an amateur radio operator so I know weather can affect the refraction of radio signals as well as soundwaves. I moved to a small town in Ohio, north of Wheeling from the western side of the Pittsburgh area. My former home was near the airport and at night, I heard the planes more as they were on the ground. Many times I could hear the C-130's of the 911th Air Force Reserve firing up their engines and even when they shut down, you heard a loud, quick groan. Over the hills for 4 miles or so, I could hear trains on the track as they blew their whistles. At the place where I live, I'm near the tracks so I always hear the trains as well as hear the diesels idling.

Most of those sounds they taped remind me of a diesel engine idling and running, while others sound like metal on metal that rub against each other in an industrial setting. Some others, well, I dunno, solar flares, something from within the Earth, aliens, and so on. I can't rule any of those out but I'd like to use Occam's Razor and see if it is more of a simple, conventional origin.