I use an Ice 45 and have not had any problems even when in the middle of a bunch of other fisherman. HumminBird uses a different frequency for the transducer than other brands.
I sold my old 35 to my buddy and he used it this weekend next to mine with no problems. Only issue is with a Helix around…This was one of the first 35’s made, but I do not believe they changed anything on them.