In 1993, the American Institute of Ultrasound in Medicine (AIUM), in conjunction with the National Electrical Manufacturers Association (NEMA) developed the Output Display Standard (ODS), including the thermal index and mechanical index which have been incorporated into the FDA’s new regulations.
Leta 1992 je ameriški FDA (Food and Drug Administration) dovolil uporabo ultrazvoka frekvence 1,6 MHz v zobnih ščetkah.