n CME : Your SA Journal of CPD - Electrotherapy - modalities

Volume 24, Issue 7
  • ISSN : 0256-2170



Extracted from text ... ELECTROTHERAPY - mOdALiTiEs Ultrasound Ultrasound is a form of mechanical energy, so strictly speaking, is not electrotherapy, although it is generally talked about when the different electrotherapy modalities are discussed. mechanical vibration at increasing frequencies is known as sound energy. Below about 16Hz, these vibrations are not recognisable as sound, and the normal human sound range is from 16Hz to something approaching 15 - 20 000 Hz (in children and young adults). Beyond this upper limit, the mechanical vibration is known as ultrasound. The frequencies used in therapy are typically between 1.0 and 3.0 mHz (1mHz = 1 million ..

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