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Hey /diy/ I'm starting an ambitious project over the summer. Basically, I'm making a sheet metal top hat with electronics inside. The hat itself will be comprised of .125 sheet metal, a raspberry pi, a small CPU fan, temperature sensor, 2 or 3 2x16 LCD displays(front) with which I will scroll text depending on the final dimensions of it. I'm thinking I'll measure the diameter of my head and make that into 8 equal sides with 2 of the sides (left and right) being a bit longer. Any tips on how I should go about this, and things I should consider? I have a pretty good budget and access to a sander and rivets. All I have right now is a 3x3' sheet metal and a pencil picture of what it roughly looks like in my head.
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I recently got a job at an open-plan office, and the constant noise is starting to bother me. I was looking for a pair of noise-cancelling headphones, and I found the kipkay video about putting headphone speakers in a pair of ear protectors, like in the pic.
An idea struck me - active noise cancellation is done by having a mic on the outside of the headphones listen to ambient noise, and mix a 180 degrees out of phase wave into the audio. I'm wondering if this could be done to normal headphones with software - have a computer listen via the mic built into my webcam and mix the audio in. I'm capable of writing such software, but I know next to nothing about sound tech. Is this feasible, or even possible?