Biografia Claudia Celis

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  • Publicado : 21 de octubre de 2012
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1. Introduction
I chose this topic because I find it very interesting and also because communication devices have been around in one form or another since early in humanity’s existence.
The communication has always been the most important part of mankind social life.
The communication devices have changedaccording to the changes in people’s living conditions and technological developments.
Throughout history the technology has had a huge impact on these devices of communication.
The first means of communication were simple messages sent and received with the primitive method of smoke signals.
Carrier pigeon was another mean of communication to send messages further away.
Later appeared the thelegraph,the telephone, the fax, mobile phones, text messages, e-mail, internet chat programmes.
The inventor and producers are aiming to develop faster, cheaper, and smaller-sized devices of communication.
2. Definition of "Device of Communication”
A communication device is anything that can be used to convey a message from one person to another. It also refers to a terminal used to send voice,video or text. There have been many such devices over the course of human history.

3. Types of Devices of Communication
In the line of time there have been many different types of devices that have been used for effective communication, including verbal and non-verbal communication.
Such communication ways include:
* Smoke signals
* Carrier pigeons
* Telegraph
* Telephone* Telex
* Fax
* Cell phones
* Computers (Desktop, laptop, tablet, etc.)

Smoke signals
The smoke signal is one of the oldest forms of communication in recorded history. It is a form of visual communication used over long distance.
The north American Indians used to communicate via smoke signal. Each tribe had their own signaling system and understanding. A signaler started afire on an elevation typically using damp grass, which would cause a column of smoke to rise.
Smoke signals are still in use today. In Rome, the College of Cardinals uses smoke signals to indicate the selection of a new Pope.

Carrier pigeons
A carrier pigeon was a well-trained bird that was used to carry messages from one place to another. Before the advent of radio, carrier pigeons werefrequently used on the battlefield as a mean for a mobile force to communicate with a stationary headquarters.
This way of communication was often used in World War I and World War II. They did an important job, but also very

dangerous. If the enemy soldiers were nearby when a pigeon was released, they knew that the bird would be carrying important messages and tried their best to shoot thepigeon down so the message could not be delivered.

A telegraph is a device for transmitting and receiving messages over long distances using Morse Code. This system was developed and patented in the USA in 1837 by Samuel Morse. His machine produced distinctive clicks which were received by another machine in the form of messages.
Telegram services were very popular and the only way toconvey information speedily over very long distances. Messages and information would now travel far and wide.
Just after the Titanic hit an Iceberg, several telegraph messages from the ship were sent claiming for help. Nowadays, the using of the telegraph is not common. In the 21st century, this device was replaced by the telephone, fax machine and Internet.

Probably no means ofcommunication has changed the daily lives of ordinary people more than the telephone. It is a communication device that transmits and receives sounds, usually the human voice. Developed in the middle of 1870’s by Alexander Graham Bell and others, the telephone has long been considered indispensable to businesses, households and governments, is now one of the most common appliances in the developed...