<unk>  is the provision of therapeutic<unk>  via the use of a portable or<unk>  machine. This method of medical<unk>  therapy can be used for various types of pain relief and physical therapy. In physics, the term<unk> " applies to all acoustic energy with a frequency above the audible range of human hearing. The audible range of sound is 20 hertz – 20 kilohertz.<unk>  frequency is greater than 20 kilohertz.
Home ultrasound
Pre-conception counseling
Non invasive prenatal testing
JumpSTART triage
Pre-hospital ultrasound
Molecular risk assessment
Obstetric ultrasonography
Fetal echocardiography