by samuel reagan n.
Skip this Video
Loading SlideShow in 5 Seconds..
Telephone PowerPoint Presentation


272 Vues Download Presentation
Télécharger la présentation


- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. By Samuel Reagan Telephone

  2. telephone • The telephone was made by Alexander Graham Bell, which is an innovation of the telegraph.

  3. Purpose of the telephone • To communicate with people around the world without meeting face to face. • to get information out easier than sending a letter with the information written on it.

  4. Original inventor • Alexander Graham Bell invented the first telephone in 1875.

  5. inventor history • In the 1870s, two inventors Elisha Gray and Alexander Graham Bell both independently designed devices that could transmit speech electrically (the telephone). Both men rushed their respective designs to the patent office within hours of each other, Alexander Graham Bell patented his telephone first. Elisha Gray and Alexander Graham Bell entered into a famous legal battle over the invention of the telephone, which Bell won.

  6. usage • The telephone Alexander Graham Bell made was originally used as a land line phone to use at home. But with the cell phone, an innovation of the telephone, we could call anywhere we are.

  7. innovation • photophone aka. the radiophone. • cell phone • sprint, at&t, verison.

  8. classification • The telephone is best classified as a information and communication artifact.

  9. positive impact • The telephone makes it easier for u to communicate with people instead of waiting for a letter or telegraph. • It also helps you get information out faster then sending a letter or telegraph.

  10. negative impact • The telephone’s negative impact is that its an invasion of privacy and unwanted bills. • Its innovation the cell phone has been a negative impact ever since its been made, people have been talking on their cell phone while driving which causes them to crash. The reason why they crash is because they’re not paying attention to what they’re doing.

  11. S.T.E.M of the telephone • science: electricity and acoustics. A telephone mouthpiece contains a thin metallic coating separated from an electrode by a thin barrier (today we use plastic) which connects to a wire carrying an electric current. When a person speaks into the mouthpiece, the acoustic vibrations from her speech push the metallic coating slightly closer to the electrode, resulting in variations in voltage and therefore a speedy conversion from acoustic to electric energy. The electric pulses are conveyed through a wire to the speaker on the other end, where electric pulses are converted into acoustic energy again.

  12. S.T.E.M • technology: The microphone takes the sound of your voice and changes it into electrical signals.   The electrical signals travel through wires until they reach the person on the other end of the phone. The speaker on the other caller’s phone then takes the electrical signals and turns them back into sound so your voice can be heard!

  13. S.T.E.M • engineering: Telecommunications engineering, or telecom engineering, is a major field within electronic engineering. The work ranges from basic circuit design to strategic mass developments. A telecommunication engineer is responsible for designing and overseeing the installation of telecommunications equipment and facilities, such as complex electronic switching systems, copper telephone facilities, and fiber optics. Telecom engineering also overlaps heavily with broadcast engineering.

  14. S.T.E.M • math: the telephone uses frequencies at different levels the telephone needs to be able to detect them and turn them back into words. So math helps it by scientist figuring out the frequency equations so the phone can decipher the frequencies and allow the person on the receiver to hear what your saying.

  15. quotes • 'Grand telegraphic discovery today ... Transmitted vocal sounds for the first time ... With some further modification I hope we may be enabled to distinguish ... the 'timbre' of the sound. Should this be so, conversation viva voce by telegraph will be a fait accompli.' • Photophone “the greatest invention I have ever made; greater than the telephone.”