Jennifer Boothroyd 
What Is Hearing? [PDF ebook] 

A fire alarm’s wail. A cat’s quiet purr Your ears let you hear all kinds of sounds, both loud and soft. But how do your ears work? And how does your sense of hearing help you? Read this book to find out! Learn all about your five senses in the Your Amazing Senses series – part of the Lightning Bolt Books(TM) collection. With high-energy designs, exciting photos, and fun text, Lightning Bolt Books(TM) bring nonfiction topics to life!