...question. If one has trodes say, in a helmet or linked to a ballistic mask and they relay information between the visual mods in the mask and the wearer, would wireless noise affect the pool bonus for vision enhancement?
It's referenced in the Gear section in the back of the Core, that ambient Noise greater than the DR of the device, will impede it's Wireless Bonus functions. But it shouldn't have as big an impact on the base functions. Which is why you can still use a DR 1 Cyberdeck to hack despite any amount of jamming, you just have penalties. If Noise could cancel out base functions, a DR 1 Cyberdeck would be completely useless.
So I would think that the base functions of your device will work despite Noise. Vision Enhancement doesn't even rely on outside data, it's just cleaning up the video, doing the old "can you enhance that image" trope.
Also could one physically link a smartgun to the trodes (provided the mask had an Image Link) and still get the +1 die pool bonus for a hardwired link in the event of high wireless noise or does one need a datajack implant for that.?
Smartlink is a different matter. It's not just using data from the gun. There is a Matrix connection to gather up-to-date weather info, such as wind speeds, barometric pressure, all sorts of fluff that turns into a perfect trajectory to assist with shooting. Those things require a clean connection to get that info, which is why Noise affects it. It's not that your Smartgun or your Smartlink can't connect, there's just too much latency for a perfect connection. And the latency throws off the math enough that there is no appreciable bonus.
Specifically addressing that 2nd quote... your mask would need Smartlink installed, plain and simple. The gun is feeding out data, but whatever Eyeware you're using for the HUD still needs the Smartlink installed to process that data. So long as you had the Smartgun, the Smartlink in your mask, and the Trodes for mental commands, you could use all the Smartlink functions at +1. Using a Datajack instead of Trodes won't matter, since it's the Smartlink itself that needs to be implanted for +2. Meaning with the gun, no mask, and Trodes, you could get +2 just as easily. Provided there's no Noise to kill the Smartlink bonus. Even with the gun, no mask, and Datajack, if the ambient Noise is high enough it will squash the Smartlink's Matrix connection and kill the bonus dice. You can still eject the magazine, but you don't get the trajectory assist.