How have they changed over time? LETS SEE!. Who invented the telephone Alexander Graham Bell, a Scottish born inventor, is the person most widely credited.

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Presentation transcript:

How have they changed over time? LETS SEE!

Who invented the telephone Alexander Graham Bell, a Scottish born inventor, is the person most widely credited as the inventor of the electric telephone. However, earlier inventors of telephone-like devices may have been Antonio Mecci or even others before him. Bell was experimenting into improving the telegraph system so that multiple messages could be set simultaneously. However while working on the model, he discovered that speech could be heard over his harmonic telegraph system.

How Telegraphs Changed over time Communication has changed over many years. It developed from simple this like the telegraph system to a more complex structures such as wired telephones to very complex structures such as cell phones. As telephones evolved, people found it easier to communicate. Today modern technology allows people to talk without having wires attached ( hands-free). It now allows web surfing ad texting.

How phones impact the environment Towers and antennas are sprouting up everywhere, powering some one billion mobile phones worldwide. The radio waves transmit electromagnetic radiation(EMR) and there seems to be no where to hide. The health exposure vary in intensity from mild symptoms s to serious diseases. Some symptoms include insomnia, headaches, dizziness, nausea, memory problems…etc. Tower for mobile phones, digital television, kill several hundred birds each year. Cows experience still birth, and birth deformities which decrease human food.

How are they used daily With technology they allowed early 24-hour media access as children an teens go about their lives, the amount of time young people spend wit entertainment media as risen dramatically. Not just young people, but older people use phones for work. Social life, and networking. This can be positive and negative.

1871- Telegraph system was created.

1970- Wired telephones created

1971-AT&T submitted proposal for cellular phones

1982-Caller ID patented by Carolyn Doughty

1982 to present day- Cells created and more complex

Bibliography Who invented the telephone? No author given. wiki.answers.com/Q/Who-invented-the-telephone. No ate given. September 8, 2010 How Telephones Change. No author given. Telephones. Change.htm. O date given. September 8,2010 The Truth About Cell Pones. Hope Fauna. http :// December September 14,2010

Bibliography part 2 Daily Media. Susa Lamantague. January 20,2010. September 14, 2010