I'm not crazy. After at least 12 iterations ~1hr per bed, I made test stubs for Presta and Schrader. They fit well and I can sleep well.
It's been three hectic days and I'm finally ready to design vertical caps like The Cheese and The Mini Hoan to grow our Milwaukee series.
Can't wait to show them off at the Bike Expo. @wonder__caps
My gain stage is literally just a lil class D amp plugged into my big class D amp 🤣. This muddy ass speaker rounds off the harshness from this janky stack. Kinda fun though. Waiting for an actual gain pedal to come in the mail.
Story time. I ran into a paper by Viktors Berstis on 3d printed acoustic lenses. The idea is that you can use twisted channels to create a spherical wavefront from a planar (speaker) wavefront improving efficiency, realism, and off-angle response by reducing turbulence. It's a bit like the waves from dropping a rock into a pond versus smacking it with a stick.
At first I based my work on the paper, but the added resonances because of the small sound channels were terrible. I couldn't replicate the paper's results. So, I made the channels bigger. It took many tries to sound good, and this is number 11.
At first I was surprised. I put it on, and the speaker just sounded louder and tighter than before. Is this the one?
The spectogram shows good results for the first time! Here I am rotating my speaker towards and then away from the mic, first without and then with the horn. You can see less variance in the signal with the horn on, except near the very top (8kHz). Instead of adding resonances, it reduced them!
It's big for what it does, but I think it's pretty neat.
