Ultrasound, or ultrasonography, works on the principle that sound is reflected at different speeds by tissues or substances of different densities. Ultrasound technology has been used medically since the 1940s. Sonograms, the pictures produced by ultrasound, can reveal heart defects, tumors, and gallstones; since low-power ultrasonic waves don’t present any risks to a body, they’re most often used to display fetuses during pregnancy in order to make sure they’re healthy. Ultrasonics has many other uses, including underwater sonar sensing. High-power ultrasonics are so intense that they’re actually used for drilling and welding.

Members of the Islamic Consultative Assembly, a member of the Energy Commission, inspected the transfer of 400 kW Sarvin lines to 230/430 kW substations and asked questions about electricity transits and the construction of power plants, which were also attended by Sarvin managers.