UD Phonographs Thomas Edison Then to Now Be an Inventor Materials 10 12 L Sound Secrets 14 16 18 Cone Projector See Sound waves Voice Recorder Phonograph 22 26 Conclusion 30 Quiz 31 Glossary 32
P HONOGRAP HS AN INTRODUCTION ave you heard of the phonograph It was an important invention It was the first machine that could record sound and play it back Thomas Edison invented many things from the lightbulb to the first movie The phonograph was one of his most famous inventions Learn how the phonograph works Do experiments Discover the invention of recorded sound for
PARTS OF A PHONOGRAPH flywheel foil recording cylinder handle mouthpiece horn
