@icedrum - very interesting topic about sound, magnetism, and electricity. I wish that Telsa had more of his research that was available for us to use- he of course was on the forefront of A/C power, when Edison was pushing his D/C power plan for electricity.
I believe that Tesla had proven that the earth itself is a giant battery, all based on electromagnetic energy & was working to harvest electricity from the air vice transmitting over electrical lines.
Telsa knew that many of his contemporaries were full of it & he didn't hesitate to call them out. Unfortunately, much of his research went missing when he died. Keep up the great content. Upvoted your post! If you'd like to do the same, please do so. Thanks.