Sally M. Walker 
Investigating Sound 

Audisee(R) e Books with Audio combine professional narration and text highlighting for an engaging read aloud experience! People, animals, machines, and wind all make sounds. But have you ever seen how sound waves move? Or made a sound wave bounce? Now you can! Explore sound with the fun experiments you’ll find in this book. As part of the Searchlight Books(TM) collection, this series sheds light on a key science question-How Does Energy Work? Hands-on experiments, interesting photos, and useful diagrams will help you find the answer!