Welcome • User Guide
ToS • Privacy • Canary
Donate • Bugs • License

©2025 Poal.co

476

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?!?

(post is archived)

You are currently inside a comment thread.
Click here to see all the comments (40).
[–] • 2 pts

The ones I saw and the TinySA, which I own, are only for RF, not for low end Audio (20Hz to maybe 400Hz?).

Got any pointers?

I figured I'd be best off with a decent mike and an FFT of the recording.

[–] • 4 pts

If you like soldering there's a Velleman K8098 Audio Analyzer Kit for 40~50$.

You can also use free Audio Analyzer apps on the crApple or jewgle store wth an external microphone.

[–] • 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.