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7
Signal Design
Step by Step
James G. Seal
7.1 INTRODUCTION
Contemporary magnetotherapy started developing immediately after World War II with the intro-
duction of various magnetic and electromagnetic eld generating systems. As was pointed out else-
where (Markov, 2007; Parker and Markov, 2011), most, if not all, of the signals were designed
through the intuition and skill of the engineer—not by taking into account the interaction of the
signals with living tissues but by applying signals that were easily available at the time. This chapter
intends to reverse this procedure, by rst establishing via research the signals needed and then using