power meter sounds are similar to Bosnian Pyramid sounds power meter sound 3:10 into https://www.youtube.com/watch?v=dW2AsO6  Z-Uo bosnian pyramid sound 2:02:20...

August 2000 Solar-Maximum Natural VLF Radio Stereo-Recording Expedition to Alberta, Canada. Between 06 and 14 August 2000 during a period of high solar-activity, I set-up two delta-loop-antenna...

Website with numerous articles, schematics, sound samples, technical information on DC- to ultra-ultra low radio and energy below 22 kHz. http://www.vlf.it/

https://www.youtube.com/watch?v=ZLBuBiGE5o0  

http://www.kathodos.com/magnetismsmall.pdf  

Parts 1 and 2 are also excellent, particularly second-half of Part 1 in which Dr Valery Uvarov describes the construction of the pyramid complex at...