Published in 2018 by Britannica Educational Publishing a trademark of Encyclopædia Britannica Inc in association with The Rosen Publishing Group Inc 29 East 21st Street New York NY 10010 Copyright 2018 The Rosen Publishing Group Inc and Encyclopædia Britannica Inc Encyclopædia Britannica Britannica and the Thistle logo are registered trademarks of Encyclopædia Britannica Inc All rights reserved Distributed exclusively by Rosen Publishing To see additional Britannica Educational Publishing titles go to rosenpublishing com First Edition Britannica Educational Publishing J E Luebering Executive Director Core Editorial Mary Rose McCudden Editor Britannica Student Encyclopedia Rosen Publishing Amelie von Zumbusch Editor Nelson Sá Art Director Nicole Russo-Duco Designer Cindy Reiman Photography Manager Karen Huang Photo Researcher Library of Congress Cataloging-in-Publication Data Names Loria Laura author Title What is sound energy Laura Loria Description First edition New York NY Britannica Educational Publishing in Association with Rosen Educational Services 2018 Series Let’s find out Forms of energy Includes bibliographical references and index Audience 1 4 Identifiers LCCN 2016058554 ISBN 9781680487169 eBook Subjects LCSH Sound Juvenile literature Classification LCC QC225 5 L67 2018 DDC 534 dc23 LC record available at https lccn loc gov 2016058554 Photo credits Cover p 1 Gandee Vasan Stone Getty Images p 4 ChristineGonsalves Shutterstock com pp 5 7 10 13 18 Encyclopæ dia Britannica Inc p 6 Svetlana Valoueva Shutterstock com p 8 LydiaGoolia iStock Thinkstock p 9 picstodisc iStock Thinkstock p 11 left rck_953 Shutterstock com right iStockphoto com spooh p 12 AdstockRF p 14 wavebreakmedia Shutterstock com p 15 Highwaystarz-Photography iStock Thinkstock p 16 Kevin Winter WireImage Getty Images p 17 iStockphoto com People Images p 19 iStockphoto com mixetto p 20 kozorog iStock Thinkstock p 21 Dorling Kindersley Thinkstock p 22 De Agostini Picture Library De Agostini Getty Images p 23 Steve Kaufman Corbis Documentary Getty Images p 24 Chad Ehlers Photographer’s Choice Getty Images p 25 Dario Lo Presti Shutterstock com p 26 Photos com Jupiterimages p 27 harleebob iStock Thinkstock p 28 Kichigin iStock Thinkstock p 29 Kzenon Shutterstock com interior pages background MoonRock Shutterstock com
Contents Power Through Movement Have You Heard Describing Sound Reflecting and Focusing Sound The Sound of Music Crank It Up Capturing Sound Animal Hearing Exploring with Sound Sounds in Medicine I Hear You Quiet Down Glossary For More Information Index 4 6 8 12 14 16 18 20 22 24 26 28 30 31 32
Power through MoveMent Have you ever heard someone describe a person by saying he or she has a lot of energy Usually when someone says that they are talking about a person who moves around a lot It’s a good description because things and people need energy to move Energy is another word for power It makes things move or work and makes living things grow The shaking movement of a jackhammer produces sound energy The sound is very loud 4
Energy can be divided into two categories potential energy and kinetic energy Potential energy is power that is stored to use later Kinetic energy is power in action or moving energy There are many different Sound waves are invisible as they travel through the air from the source of a sound Vocabulary Something that vibrates has a shaking movement kinds of energy such as electricity heat and light Sound energy is made when an object or part of an object vibrates The vibrations move the air around it to make sound waves These are what we hear 5
