This subunit goes beyond a school curriculum. 
It links to basic sound concepts, which are part of the standard curriculum and shows application of ultrasound in medicine.

For this subunit students should have prior knowledge about sound, for example a good background gives ESTABLISH Unit 1 ‘Sound’, ‘Subunit 1. Sound exploration’.

Students should be familiar with concepts like wave nature of sound (propagation, reflection), sound echo, sound speed, they should know that the speed of sound depends on the medium. Student should be able to calculate the distance covered by a sound wave based on a given time interval and speed of sound.

The activities in this subunit introduce students to the following physic concepts and ideas:

  • ultrasonic sound
  • echolocation
  • sound reflection
  • the speed of sound varies in different media
  • ultrasound can be used to make images of inside
  • ultrasound A-scan and B-scan
  • advantages and disadvantages of ultrasound imaging.