The sounds produce by the LENR reaction may be coming from Bosenova events when EMF Black Holes explode as observed by Dr. Kim. I predict that the sounds that are coming from the E Cat are a multitude of popping noises. When Rossi hears this sound through his stethoscope, he knows that the LENR reaction is progressing nicely.
[image: Thumbnail] <https://pathoskeptic.files.wordpress.com/2015/05/rossi.jpg>