Notes

What is that sound?
32 pages
illustrations (chiefly colour)
Contents: What is sound? -- Types of sound -- Making music -- How to describe a sound -- Too loud! -- Technology and sound -- Ears -- Echoes -- Echolocation -- Sound in medicine -- Reverberation -- Places change sound -- Outer space -- Thunder and lightning -- Noise pollution -- Words about sound.
Summary: Have you ever wondered how sound gets from the place where it is made, and travels to your ears, where you hear it? Sound is not something you can see. This is because sound is a transfer of energy. Is sound the same in outer space as it is on Earth, and how do astronauts hear each other?
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