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History 5 Week 5
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This week in history I learned about the microphone, the typewriter, the braille writing system, and the sewing machine. First, I learned abort the microphone. Attempts to amplify sound have been ongoing since Ancient Greece. Charles Wheatstone invented the concept of the microphone in 1827. Microphones convert sound waves into electric signals for amplification, storage,…
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Latest Comment
I loved this book so much!
people used the same evidence they used to condemm her to declare her saint! isn’t that neat!
Me too!!!