Fig. 5.

(A) Wiring behind the unfinished wall of a bedroom. (B) The AC (alternating current) voltage on a person's body can be measured with a voltmeter [64]. The black terminal is connected with a wire to a rod in the ground and the red terminal connects to a probe held in the right hand. Here a voltage of 17.1 V is measured on a person's body. Experience and research have shown that this level of voltage is not conducive to relaxation and sleep and can be associated with a number of chronic disorders listed in supplemental file 2.