Communication Technology

Learning Standard 3. Communication Technologies Ideas can be communicated through engineering drawings, written reports, and pictures. 3.1 Identify and explain the components of a communication system, i.e., source, encoder, transmitter, receiver, decoder, storage, retrieval, and destination. 3.2 Identify and explain the appropriate tools, machines, and electronic devices (e.g. drawing tools, computer aided design, and cameras) used to produce and/or reproduce design solutions (e.g., engineering drawings, prototypes, and reports) 3.3 Identify and compare communication technologies and systems, i.e., audio, visual, printed and mass communication. 3.4 Identify and explain how symbols and icons (e.g., international symbols and graphics) are used to communicate a message.

Learning Objectives At the conclusion of the unit students will be able to: Define communication & communication technology & understand the difference between them Understand the 5 things that must be considered when creating a message in order for the message to be effective Identify & understand the different types of communication Identify & explain the components of a communication system Understand what an icon/symbol is & why they are important to communication technology Understand why Alexander Graham Bell, Philo Farnsworth, Martin Cooper & Tim Berners-Lee are important to the advancement of communication technology

Communication: Communication Technology allows humans to share ideas easier This information is used to help people make decisions solve problems Exchange of information between people

Message Design Purpose of the Message:WHY have you created the message In order to create an effective message, the person creating it needs to be aware of 5 things: Intended Audience:WHO will be receiving the message Ideas being exchanged must be understood in order for communication to be effective…

Message Design Nature of the Message:WHAT is the message about Language used create message: Message should be created using language that is understandable to the intended audience to allow clear communication Medium Being Used:HOW will the message be delivered (TV, Radio, Billboard, Internet, Text Message, , Music, etc…)

Types of Communication Technology

Mass Communication Communication to a large number of people at one time

Began with the invention of the Printing Press Mass Communication Invented by Johannes Gutenberg in 1448 Prior to this invention, people had to write every word on every page of every book by hand – this was a very slow process The device made it possible for the common man, woman & child to have access to books for the first time, which meant they would also have the ability to accumulate knowledge As a result books were very expensive so only wealthy people had access to the knowledge they contained

Telecommunication Communication over a distance Examples:Phones, televisions, radios, satellites

Graphic Communication Communication that sends & receives messages visually using of drawn or printed pictures & symbols Examples: People send & receive messages through reading, writing, drawing & painting Magazines, newspapers, messages on clothing, billboards, road signs, computer images

Wave Communication Communication that moves in waves Sound Waves: Example: Vibrations traveling through the air, water etc. that can be perceived by the human ear Light Waves:Message is transmitted as waves of light Example: Musical instruments & human voice Television

Electromagnetic Carrier Waves: Wave Communication Message is converted into electrical signals and carried through the atmosphere. Large antennas & dishes transmit & receive the signals. Example:Television & radio broadcasts Cell Phone calls

This creates a more complete & entertaining message Multimedia Communication Audio refers to: Video refers to: Sound Images Combining text, sound & images into one presentation Frequently used for: Entertainment Education Advertising

Components of a Communication System Source Encoder Transmitter Decoder Receiver Where the information begins / where the signal is sent from Examples: voice or image Changes the information (message) into code so it can be sent (transmitted) Sends the encoded message over a channel Translates the encoded message into useful information so that it can be understood Takes in the encoded message sent through the channel by the transmitter Channel:The medium or link through which a signal is sent from the transmitter to the receiver Examples: wire cables, fiber-optic cables, wireless wave communication

Many communication systems often have 2 additional components that allow information to be saved so that it can be accessed when needed Storage:Message is saved for later use Retrieval:Message is recalled when needed Examples:Voic / Telephone answering machine Components of a Communication System Books / Notebooks iPods / MP3 Players / Cameras CDs / DVDs / Blu-rays Video Games Computer hard drives / Flash drives

Icon/Symbol: Icons & Symbols A picture or image that is used to represent something else Allows people to communicate without using words

Icons & Symbols

Alexander Graham Bell Born March 3, 1847 in Edinburgh, Scotland Worked as a teacher for deaf students in Boston & became a professor at Boston University Obtained the first patent for the telephone on March 7, 1876

Alexander Graham Bell Made first phone call to his assistant Thomas Watson who was working in another room on March 12, 1876 Created the Bell Telephone Company on July 9, 1877 with Watson and several other business partners The first long distance call between New York City & Chicago in October 1892 The first long distance call across the United States was made between New York City & San Francisco on January 25, 1915

Alexander Graham Bell Interestingly, Bell considered the telephone an intrusion and would not have one in his Study

Philo Farnsworth Born in Utah in 1906 First person to create a fully functional all- electronic television system & demonstrate it to the public in 1927 Holds over 165 patents

Martin Cooper Born in Chicago in 1928 Made the first Cell Phone call on April 3, 1973 in New York City Worked as a General Manager for Motorola’s Communication Systems Division The call was made to his friend & competitive rival who was working for Bell Labs who was also working to develop a cellular phone

Martin Cooper It took 10 years for the cell phone to be ready to sell to the public (1983) This first publicly available cell phone weighed 16 ounces (1 pound) & sold for $3500 Today Cooper is the CEO of ArrayCom, a company that he co-founded in 1992 ArrayCom develops more reliable and inexpensive cellular antennas

Tim Berners-Lee Born in England in 1955 Worked as a computer scientist for CERN in Switzerland in 1989 CERN employed thousands of Nuclear Research Scientists & engineers worldwide

Tim Berners-Lee Workers at CERN needed a way to share technical information & documents Berners-Lee was working to come up with a solution to his company’s problem

Tim Berners-Lee Hypertext:One piece of computer text can be linked with another

Tim Berners-Lee Using the hypertext concept - Tim Berners-Lee wrote the first “browser” software Text and documents could be linked together - not just within CERN but over the entire internet Berners-Lee had been experimenting with his own version of hypertext

Tim Berners-Lee This could be done using mouse clicks – no typing was necessary He called his program “World Wide Web” which worked like current browsers except there were no pictures or color monitors

Tim Berners-Lee The first website went online on August 6, CERN announced that it could be used by the public for free in 1993 The fact that it was free was very important to the growth of the Web

Tim Berners-Lee The World Wide Web has become arguably most powerful communication medium the world has known Today Berners-Lee works at MIT in Cambridge, Massachusetts and is the leader of an organization (W3C) that is responsible for overseeing the Web’s continued development