Page 6 - LESSON 13 LN3

TELEPHONE

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A system for transmitting voices over a
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d i s t a n c e u s i n g w i r e o r r a d i o , b y c o n v e r t i n g
distance using wire or radio, by converting
a c o u s t i c v i b r a t i o n s t o e l e c t r i c a l s i g n a l s .
acoustic vibrations to electrical signals.
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Alexander Graham Bell invented the
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telephone in the year 1876.
Today we have mobile phones which also

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e n a b l e s u s t o s e n d m a s s a g e s , e m a i l s , a n d
enables us to send massages, emails , and
connect to the internet.