the history of the phone group 1 4a0c0118 linda 陳雯琪 4a0c0125 mo 鄭琇文 4a0c0116 victoria...
TRANSCRIPT
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The History of the Phone
Group 14a0c0118 Linda 陳雯琪4a0c0125 Mo 鄭琇文4a0c0116 Victoria 王鈺潔
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Vocabulary-definition
in the vicinity of- in the area around particular place
transmission-sending or passing from one person, place, or thing to another
via- going or sending something through something else “I talked to him via the internet”
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Vocabulary-definition
cables- a plastic or rubber tube containing wires that carry telephone messages, electronic signals, television pictures etc.
simultaneously- happen at exactly the same time
audible- you can hear it
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Vocabulary-definition
patented- a special document that gives you the right to make or sell a new invention or product that no one else is allowed to copy
vibration-a continuous slight shaking movement
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History of phone A telephone, or phone, is
a telecommunications device that permits two or more users to conduct a conversation when they are not in the same vicinity of each other to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible form to its user. The word telephone has been adapted into the vocabulary of many languages. It is derived from the Greek: τῆλε, tēle, "far" and φωνή, phōnē, "voice", together meaning "distant voice".
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History of phone
First patented in 1876 by Alexander Graham Bell and further developed by many others, the telephone was the first device in history that enabled people to talk directly with each other across large distances. Telephones rapidly became indispensable to businesses, government, and households, and are today some of the most widely used small appliances.
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History of phone
http://www.youtube.com/watch?v=xdIXoceFgk8
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Theory of phone
When we speak against the side of the cups, sound waves will shake bottom of the cup. The vibrations transmit to the bottom of another cup via a string. The bottom of the cup shakes air, producing the same sound waves. When our eardrum vibrates then we can hear each other's voice.
This proves that sound can be transmitted by vibrating air. You need to make sure the rope is tense or the sound waves won’t be transmitted.
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Evolution of phone
In 1896
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Evolution of phone
Early 1990
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Evolution of phone
In 1946
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Evolution of phone
In 1985
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Evolution of phone
In 2000
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Evolution of phone
In 2000s
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Evolution of phone
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Video
http://www.youtube.com/watch?v=qWUP9EigdjY
http://www.youtube.com/watch?v=OD8OcPGScRU
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Materials of making homemade phone
Two cups About 1 meter long cotton Two paper clips A pen and scissors
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Materials of making homemade phone
Step production: Drill holes in the bottom of the
cups Thread the cotton between caps Fasten paperclip on cotton of the
cup’s bottom Tie the cotton