Communication - Vibration, Electronic Signals, and Electromagnetic Radiation
by
Regan Lum
Lesson Plan...
Structure:
- Introduction - Communication (time required: 1-2 periods)
- Review Hearing and Speaking
- What is sound?
- Sound production
- How humans produce sound
- frequencies produced by humans and animals
- Hearing
- frequencies heard by humans and animals
Enhancing our ability to communicate through technology
- megaphone
- electronic devices
- laboratory- cup and string walkie talkie
Changing Voices to Electronic Signals
- How does a microphone and a speaker work?
- Making a Pie Pan Speaker Demonstration
- Making a Speaker Laboratory
- Saving voices on magnetic tape
- demonstration - make our own magnetic tape and record on it
Sending an Electronic Signal Through the Air, Wire, Fiber Optics
- Electronic signal to electromagnetic radiation
- transmitters
- Electromagnetic radiation to electrical signals to sound
- amplifiers
- Laboratory - Modulated Laser
Using Electronic Signals To Talk To and Control Machines (time required
? - This section still needs to be developed)
- Computers
- Binary codes
- Radio controlled toys demonstration
- We can send machines to work in dangerous environments.
- drones and remote submarines
- space probes and satellites
- satellite controls
- Extension of our senses with instruments
- cameras
- sensors
- telescopes
- collectors
Closure
Demonstrations and Laboratories:
-
String Walkie Talkie Laboratory
-
Making a Pie Pan Speaker Demonstration
-
Making a Speaker Laboratory
-
Modulated Laser Laboratory
For more information about this lesson plan:
Summary
Introduction
Preparation
References
For more information, email your comments to
outreach@cea.berkeley.edu
or contact
Regan Lum
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