Listening to the Power Grid

[Alan Sondheim]

Listening to the Power Grid


A 100' external long-wire antenna is connected to a VLF-3 receiver
grounded in the building. The receiver output is recorded on a Sony
minidisk. The final result is filtered until patterns are readily
discerned. The jpg below is from SpectrumLab of the raw material.
Frequency shifts show a moire-pattern in time.

http://www.asondheim.org/gridnoise1.mp3
http://www.asondheim.org/gridnoise2.mp3
http://www.asondheim.org/pwrgrid2am.jpg