Lesson: Acoustic Impedance Physics

Students will be able to

• define the acoustic impedance of a medium as the product of the density of the medium and the speed of sound in the medium,
• relate the intensity, , of sound waves incident at a boundary between two media and the intensity, , of sound waves reflected from the boundary to the acoustic impedances of the medium the sound waves travel in before arriving at the boundary, , and the medium the sound waves travel in after being transmitted across the boundary, , applying the formula, ,
• describe the operation of piezoelectric transducers used to produce ultrasonic frequency sound waves qualitatively.