First known introduction into ultrasound physics with Lazzaro's discovery of bats and their hearing dealing with ultrasound waves
Thomas Young discovered phase shifting of light waves. We use this technique today, for 3D ultrasound pictures.
Jean used a church bell and submerged into water to prove that sound travels faster than through water than air. His discovery of the speed of sound underwater lead the way to modern ultrasound sonography
The Piezo-electric effect ( piezo meaning pressure) is when different types of crystals reacted with an electrical potential when mechanical stress was brought in. This idea came from Physicist Gabriel Lippman. The relationship between crystalline structures and electrical changes voltage created the opportunity to create ultrasound technology to echo sounding devices.
Paul continued Canadian Reginald Fessenden's work of making the first working ultrasound machine
Karl started experimenting with cranial ultrasound as a diagnostic tool while working at the hospital at Bad Ischl, Austria and in the university of Vienna. He tried to detect brain brain tumors he was also the first to find abnormalities in the head, tissue, and body fluids.
George was the first to detect gallstones with the first abdominal ultrasound