Thursday, January 19, 2012 9:41:07 AM
I've heard the sound myself, back in late summer/early autumn. Sounded exactly like these...exactly. I walked around, trying to find the source of the sound (thought it was construction on the road), but saw nothing. The sound continued for about 20 minutes, then stopped. I work in an industrial part of town, so I assumed it was something industry related...but, never heard it before, never heard it since.