telephones AN INTRODUCTION Today you can talk to a friend or family member anytime Telephones make it possible The telephone is a machine It lets people talk to each other from far away They can be across the street or across the country A phone changes sound into data The data is sent to another phone It turns the data back into sound
telephones
parts of a telephone receiver earpiece keypad body Telephone is made from two tele distance phone voice Learn how the telephone works Do Discover the invention of the telephone
two Greek words voice experiments telephone for yourself transmitter mouthpiece handset cord
