Product review (5 stars): This spalsh guard right here ... this is the splash guard!
Don't let the "sound baffle" in the title mislead you, for those of you who, like me, are unfamiliar with plumbing lingo. This is a proper drop-in splash guard for the InSinkErator. I have a Badger 5, and the splash guard it came with started crumbling to pieces and getting all nasty. I took a razor and cut off the remaining slimy little bits of old splash guard as best I could (there were still little bumps around the rim that I could not remove), then pushed this one down the 3" diameter drain and it easily popped into place. No need to remove the disposer. Water drains through nicely. And it does seem to keep the noise level down a notch when running the disposer. Larger food scraps (like egg shells) need to be shoved through, but that's not an issue for me personally.