How does a telephone carry voice of the people over long distances?
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Your voice (along with thousands of others) becomes a stream of bytes flowing on a fiber-optic line between offices. The difference in cost between "a pair of copper wires carrying a single conversation" and "a single fiber carrying thousands and thousands of conversations" is phenomenal.
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- Your voice (along with thousands of others) becomes a stream of bytes flowing on a fiber-optic line between offices. The difference in cost between "a pair of copper wires carrying a single conversation" and "a single fiber carrying thousands and thousands of conversations" is phenomenal.
- The sound waves are carried to a thin metal disk inside the phone, called a diaphragm, and are converted into electrical energy. The electrical energy travels over wires to another phone and is converted from electrical energy to sound waves again which can be heard by someone on the other end of the phone
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