I've been doing a lot of work on the helmet and associated electronics over the past few months. I wound up buying the typical hearing and voice assist as well as an iComm. I like them, but getting them in my helmet felt a bit bulky to me. Since I've been doing some light electronics work on the side, I figured I'd see if I could piece together a simplified amplifier system. The following images are what I came up with using some simple amp breakouts and designing a PCB for them to mount to.
This was from my first run of PCBs that I ordered to test out the design. There were a few things wrong with them, including the 3.5mm jacks being the wrong layout, but it mostly works. This combines voice assist, hearing assist, and fan control into one roughly 3"x3" PCB.
I have some revisions I plan to make, which includes realigning the modules on the PCB so that it's longer than it is square such that it can fit in the helmet hump along the neck better. I also want to do away with the JST connectors and have them just connect to pads along the side of the PCB so that it's as flat as absolutely possible.
In the meantime, I went ahead and molded the hearing assist mics into the ears of the helmet. I took some black ABS 3d printing filament I had and created some ABS paste so that the holes in the ears to accommodate the mics are basically invisible.
Need to do some ear cleanup around that area, but I'm probably going to wind up repainting my helmet anyways so no big deal there.
Anyways, I'm pretty excited about the electronics in the helmet. I also have some wireless Qi chargers that I plan to embed in the padding such that I can set the helmet on a stand and have it charge without having to plug anything in. You can see the beginning stages of that circuit below also.