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I don't think its my ears and my wife hears it too. I guess it's at about 70 Hz? It's very constant in frequency and maybe I'm only hearing a harmonic of a lower one?

Took a little drive about a mile out and its still there, a good distance from any industrial buildings.

Drives me a little nuts.

My laptop and phone mikes don't seem to pick it up, I don't see any discernable peaks in the spectrum analyzer with Audacity.

Maybe there is a pump running somewhere, since we had torrential rainfalls since about yesterday. But to still hear it, almost two kilometers out?!?

I don't think its my ears and my wife hears it too. I guess it's at about 70 Hz? It's very constant in frequency and maybe I'm only hearing a harmonic of a lower one? Took a little drive about a mile out and its still there, a good distance from any industrial buildings. Drives me a little nuts. My laptop and phone mikes don't seem to pick it up, I don't see any discernable peaks in the spectrum analyzer with Audacity. Maybe there is a pump running somewhere, since we had torrential rainfalls since about yesterday. But to still hear it, almost two kilometers out?!?

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[–] • 3 pts

Wow...wow....Velleman is still using those ancient LCDs.

I had one of their little handheld 10MHz scopes. Great little portable device. It had one of those LCDs and it was a decade old when I got it. Did the same thing they all do and the front end blew out one day and that's all she wrote.