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
