#$%^&*AU2013100537A420130523.pdf#####I :\jr\lnterwoen\NRPortbl\DCC\JR\5086796_ .doc-18 04/2013 ABSTRACT: Apparatus for exposing a biological subject to an electromagnetic field, the apparatus including a pair of spaced apart antennae, the subject being positioned between the antennae in use a signal generator for applying a signal to the antennae to thereby deliver an 5 electromagnetic field into the subject, the electromagnetic field including first and second superimposed frequencies, the second frequency being higher than the first frequency, a sensor for sensing electrical signals in the subject, and a controller that controls the signal generator to thereby control the electromagnetic field delivered into the subject in accordance with the electrical signals in the subject.2/5 §4 I A I 1 4 4( I ~v I1~J ~ L 77 I L~ I L K: Ltx I I ~ L Ki IV4~ I N ~gt