The Cliff's Notes version is as follows:
I'm using a Pyle Pro instead of Hovi mcs, so in my bucket I only have two sets of fans (a pair of small fans behind the hovi tips and a pair of blowers in my forehead), the MK136 hearing assist, and a wireless mic. The former two both run from a single Antec LifeBar 3 USB power bank which has two 5v outputs at 1A and 2A. I use the former for the MK136 and the latter for the fans.
On initial install of the MK136, I got a lot of EM noise from the fans through the MK136. After thinking about how to create a low-pass filter, I used off-the-shelf tech and grabbed a US VDSL filter, just to experiment with, since I know that these simple devices filter noise out above a certain frequency in order to keep analog phone conversations and VDSL DMTs from interfering with each other. Sure enough, it worked. So I unboxed the filter, shrink wrapped it, and installed it in-line between the LifeBar and the MK136.
Of course, then I ended up also having to deal with all the RF noise on the MK136 from the wireless mic, which involved a lot of copper tape