Introduction to Technology

Chapter 9: Communication Systems

Chapter Summaries

Section 9.1
The communication system includes input, which is the message; the process, or how the message moves; output, or receiving the message; and feedback, which includes information about clarity. Communication subsystems have a source, an encoder, a transmitter, a receiver, a decoder, and a destination. Biological, graphic, wave, and telecommunication are all forms of communication.

Section 9.2
The modes of communication include people to people, people to machines, machines to people, and machines to machines. Communication technology has made new modes of communication possible through graphic communication systems, print, and modes based on electrical signals.

Section 9.3
Positive impacts of communication technology are rapid mass communication systems that report news and politics. More information is available for making choices. People gain a better understanding of cultures. Technology may improve security systems. Negative impacts might be invasion of personal privacy. Using more paper for printouts, chemicals for manufacturing, and using electrical systems may be harmful.