I made an ‘amplifier’ for my iphone.
OK, I made several.
The idea here is to reflect sound to the user. My first attempt destroyed stereo separation but proved that easy listening with a sound guide on the iphone can make for easier listening. This amp does not have a knob that goes to 11, but it does a good job of improving the amount of sound you hear.
The second one I made had stereo separation, and worked really well, proving a good sound environment was still possible. It reflected the sounds too well in a way, it hurt your ears after a while even though the sound was not what a cranked up speaker could produce. So I worked with the acoustics a bit and found that the angle of reflection and a less hard finish could allow the same volume without the impact on your ear drums.
Every year I try to do a power tool involved project just so I remember why I prefer hand tools. This time I used my most hated of all tools. The electric router.
I really hate electric routers screaming tailed wood manglers obliterate peace, throw dust and introduce danger to the workplace.
Here are the tools I made for the project. 3 modified drill bits to bore conic holes, and two sanding fids.
This sanding fid has a slit in it that I can slide sand paper into.
Then I can wrap the sand paper around the cone and sand a conic hole.