Summary: This LO attempts to conceptually explain the Doppler Effect through the analogy of a duck in a pond (as it is easier to conceptualize water waves than sound waves), and also explores shock waves (sonic booms, wakes) and includes a practice problem. A PowerPoint presentation was used to integrate text, formulas and original diagrams.
https://www.slideshare.net/secret/v8DOvalq0TiODc