Is the train loud? Is the whisper quiet? Hearing is one of our five senses. Senses help us learn about the world around us. We hear sounds with our ears. In Hearing, readers will learn what sorts of sounds our ears allow us to hear. This is an AV2 media enhanced book. A unique book code printed on page 2 unlocks multimedia content. This book comes alive with video, audio, weblinks, slide shows, activities, hands-on experiments, and much more.