Home » Uncategorized » Initial baseline EM recordings

Initial baseline EM recordings

Follow World Hum Map and Database Project on WordPress.com
Follow World Hum Map and Database Project on WordPress.com

Finally, I had time to switch on George G’s EM device and make a few initial recordings. In the screenshot below, you can see that at the 10-second mark, I switched on the device. You can see the strong spectral lines at the odd harmonics of the power mains (60 Hz in North America).  This is a good sign. When I feel reasonably confident in my use of Audacity (OS X audio software), then I will establish once and for all whether VLF radio frequencies are not responsible for the Worldwide Hum. I’ll keep you posted.

Screen Shot 2017-07-22 at 6.47.41 PM

 

 


1 Comment

  1. Glen –

    Can you describe the vertical axis calibration?

    Odd harmonics (only) of 60 Hz could indicate a clipped sine wave (like a square).

    Even harmonics (only) of 60 Hz would be a 120 Hz pitch such as what we hear acoustically (ferromagnetic metal casing of transformers) and electronically from full-wave rectifiers.

    Thanks – Bernie

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: