Learn more about the Doppler Effect.
Learn more about sound, echoes, music and more at DK Find Out.
How does Sonar work? Visit NOAA to find out.
Does a duck's quack echo?
View a chart of decibel levels of common sounds.
What do sound waves look like? Visit NPR.org to find out.
The Exploratorium has a lot of great sound projects for you to do at home. You'll want to try these!