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communication tools

communication tools. 2014/9/15. Story on the invention of the telephone. The idea of long distance between the call has long been. In the 1870s, the American inventor Gray first designed a couple telegraph device. He used two cans, link up the bottom of each box by a taut 绷紧的 rope. 2014/9/15.

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communication tools

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  1. communication tools 2014/9/15

  2. Story on the invention of the telephone • The idea of long distance between the call has long been. In the 1870s, the American inventor Gray first designed a couple telegraph device. He used two cans, link up the bottom of each box by ataut绷紧的rope. 2014/9/15

  3. Story on the invention of the telephone • Gray's idea is good, but it is not easy. This arduous艰苦的task falls on the shoulders of another inventor Bell. • Bell and his assistant, Watson, hands-on design center set up the speaker of the magnetic有磁性的reed簧片. This speaker can transmit a variety of frequency sounds, vibrating reed into a variety of oscillations摆动by electromagnetic induction. 电磁感应 2014/9/15

  4. Bell placing the first New York to Chicago telephone call in 1892

  5. Classical telephones 2014/9/15 1902, Kellogg corner of the desk phone

  6. 2014/9/15 1912 - The office arranged machine 1907 "German model" of a radio-band phone

  7. The changes of communication tools from the old days to now

  8. In the old days, there were some stages(驿站）, but they were available to the officer only at the beginning. letter

  9. The feature of the old days’ communication ways: 1.Limited 2.Slow 3. Uncertainty 2014/9/15

  10. In 1877,the telegraph was invented. It’s faster, but also more expensive. And it’s not very widely used, because it’s at war at that time, most of the equipment were damaged.

  11. Dial-and-talk operation makes common people have access to telephone. Compared with letter writing, telegraphy and other means of communications, making calls is easy and interactive. In case of emergency, urgent message can be sent out immediately. Telephone

  12. Telephone lines not only convey information but also glue all relationships. With this convenient tool of modern communication, people may be out of sight, but never out of mind. 2014/9/15

  13. beeper

  14. Cell phone 大哥大 Can you guess how much it cost? It’s about 20000-25000 RMB • Do you know the brand of the first cell phone in China? • Motorola(摩托罗拉）

  15. internet • Email • QQ • MSN • Mircoblog… What will be in the future? Time will tell!!!

  16. Only for voice calls Adds the function of receiving data, such as SMS images, music, video and other media forms 2014/9/15

  17. Visual telephone The era of the 3G along with the extensive application of the network technology, video network technology is developing rapidly. 2014/9/15

  18. Visual telephone, it also called video phone. This is a specially designed can make both sides of a call during a conversation view each other. The videophone is the use of telephone line real-time transmission of voice and image (the user's bust, photos, and other items) as a means of communication. 2014/9/15

  19. families business meeting lover friends 2014/9/15

  20. 2014/9/15

  21. Mobile phones benefit us a lot. We get information more quickly, we make friends easier, various apps make our life wonderful... But on the other hand, it do harms to us imperceptibly. 2014/9/15

  22. It was found that many people bow their heads and keep checking the cellphones whatever on the street, in the metro or in the bus. We call those people Bow Group. Mostly, Bow Group consist of students and office workers. Bow Group（低头族） 2014/9/15

  23. 2014/9/15

  24. 4 main symptoms of Bow Group1.They take photos everywhere when they are outside just like punch in.（上班打卡）.2.It is difficult for them to concentrate what are people saying. On many occasions, such as party and gathering. If the phone rings or gets a message, they must reply first. 3.They always charging.4.They can't live normally without cellphone. 2014/9/15

  25. HAVE YOU EVER RUN INTO THESE SITUATIONS? 2014/9/15

  26. Scene OneYour friends don't talk to you in a gathering, on the contrary, they show interests in a stranger's word or a celebrity's tweet? 2014/9/15

  27. Scene TwoEveryone takes up the phone and take photos of the food before eating. 2014/9/15

  28. Scene ThreeWhen a traffic or some big events happened on the street, people will upload photos of the scene to microblog at once and gather around there, but they don't help. 2014/9/15

  29. Scene FourYour friend just sit next to you, but he texts you instead of talk to you. 2014/9/15

  30. In a fast-paced , stressful and busy society, people's time are fragmented. The chance for one to chase a bus and have dinner alone was increased. And this lead to the view that young people have to grasp the spare time for entertainment with their mobile phones. It is necessary for them to use mobile phone. Why would these happened? 2014/9/15

  31. For some part of young people, this kind of lifestyle is too common. But as the other people said, look at the mobile phone and ignore those people around you would be impolite, or even destroy the aesthetic feelings of life we used to have. People are having a longer distance between each other in a relationship. So please put down your mobile phones, talk to people. 2014/9/15

  32. Thank you!!! 2014/9/15

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