"Electrostatics ... Earth wire current . nateral chimical betteries " <--- These are NOT noise sources??


Lemon juice , Potatoes ,vinegar etc etc.. are few other sources to add incase you dont know. We can even generete electrons from a water flowing from top to bottom in air by placing to electrodes one at top and other at bottom seperated by some distance . Geothermal is another such source ..And :) microvoltes are also present on human body itself .

AP