| Lab Name |
Properties of underwater waves.
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| Subject Area |
Science
|
| Grade |
6 - 8
|
| Topic |
Waves (EM and mechanical)
|
| Experiment Title |
Visualization of AM and FM wave signals from a microphone showing the frequency and amplitude
|
| Hardware |
Linux machines (i.e., laptop, raspberry pi), 2 Software Defined Radios (ADALM Pluto) and a pair of walkie-talkies.
|
| Software |
GNU Radio, COSMOS toolkit framework.
|
| Number of Sessions to teach the topic |
1 - 2 sessions.
|
| Educational standards to be addressed |
- MS-PS4-1
Develop a model and use mathematical representations to describe waves that include frequency, wavelength, and how the amplitude of a wave is related to the energy in a wave.
- MS-PS4-2
Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.
|
| COSMOS concepts to be used for the lab |
Signal strength, signal attenuation, and wave propagation.
|
| K12 Educational Goals (How the educational goals are achieved through teaching using the experiment, how the topic is connected to the COSMOS concepts used) |
By conducting this experiment students will better understand some of the limits inherent in wireless transmission. |
| Short Description and Walk-through of the experiment |
- Teacher reviews mechanical vs. electromagnetic waves and how they travel differently.
- Students speculate about radio waves’ ability to travel through different materials.
- Students use walkie talkies and the COSMOS tool kit to observe the radio wave signal from walkie talkies traveling through different materials.
- Students record signal strength.
- Students analyze data and discuss the potential applications of their experiment.
|
| Testbed mapping of the experiment |
- Students may be able to analyze the testbed design (explore the geography of West Harlem and how the landscape/buildings influence the placement of nodes).
- Students may be able to log in to the testbed to measure the signal strength between nodes in different locations (ex: top of a light pole versus tall building, etc.).
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© 2019 COSMOS Project. Created by Anne Williard, Mott Hall 2.