The Concept of Ultrasound in Beauty Therapy
What is ultrasound? Ultrasound is a sound wave outside of the human audible rangeThe lower and upper limits of frequencies audible to the human ear are 20 Hz to 0,000 Hz.Ultrasound exceeds the limit of 20 kHz. High-frequency ultrasound cosmetic treatments are, as a rule, in the 1 MHz to 10 MHz range, allowing them […]
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