In the future, humans may no longer be using earbuds. Lasers could be used to create sounds. MIT was able to transmit sound using a laser by using a fast moving mirror to “wiggle” water molecules in a person’s ear. This has been done before, and the CIA reputedly uses it as a spy tool, but MIT was able to make the audio surprisingly loud.
Here is where I got my info: https://www.livescience.com/64619-laser-sound-beam.html
This is related to engineering because it shows the prototype aspect in the engineering process.
