Microphones, speakers Haptics, other signals sent out of the phone
- Due Oct 24, 2024 by 12:25pm
- Points 10
- Submitting a text entry box or a file upload
HOw Your Phone Talks to YOU!
Your phone sends you lots of information in a lot of different ways:
- Speakers give you audible sounds
- The phone's display gives you visible information
- Vibration gives your indications
Learning Objectives
- Brainstorm different ways smartphones send out information. Start with our senses -- hearing: speaker, sight:screen + flashlight, touch: haptic vibration. We are still missing smell:?, taste:?
- What types of signals does your phone use: cellualr, wifi, bluetooth - how are these different?
Pre-Class Assignment
None today.
In Class Activities
-
- Brainstorm the different ways phones send out information
- Learn about different types of electromagnetic signals your phone uses.
- Let's do a phone scavenger hunt: (start by helping create questions you'd like to know the answer to)
- How does a speaker work? Speaker Chip Uses Ultrasound to Crack Volume Limits - IEEE Spectrum Links to an external site.
- Why is it named Bluetooth?
- How does a phone connect to the internet?
- What's the internet anyway?
- Where was the internet invented?
- What kinds of magnets are used in cell phones?
- Where are they produced? (and what geopolitical issues surround them?)
- How much processing power does it take to transmit Bluetooth?
- Average range for headphones, phones, laptops?
- Can you jam Bluetooth, wifi, cellular?
- Who invented frequency hopped spread spectrum?
- Where is the technology going from here?
- How easy is it to hack Bluetooth?
- Are there more advanced encryption protocols?
Extra Resources
- How does the internet work
- Laying and repairing undersea cables
- How do speakers work?
- How does the taptic vibration engine work?
- History and use of the taptic engine
- Rare Earth Magnets
What are they and where are they used in the phone? https://idealmagnetsolutions.com/knowledge-base/small-ndfeb-magnets-in-smartphones-and-personal-electronics/ Links to an external site.
Global production (Why China's Rare Earth Dominance Persists) https://www.newsecuritybeat.org/2024/08/mine-the-tech-gap-why-chinas-rare-earth-dominance-persists Links to an external site.
what to submit today
- SubTurn in your answers to 5 or more interesting questions, with the URL links (at least 1) to where you found that information.
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