I'm stuck in a sort of if/then loop when it comes to this feat.
Dampen Presence says "You may use the Stealth skill to hide from any creature attempting to perceive you using blindsight or blindsense, even if you are clearly in that creature’s perceptual field."
But then it says "This feat does not confer any advantages against other forms of perception, such as scent, vision, or tremorsense."
And then we have creatures like the Banshee, with the "hear heartbeat" ability, which says "banshee can sense the beating hearts of living creatures within 60 feet, as if it had the blindsight ability."
Does this mean we should view the banshee as having blindsight for the feat, or should we think of "Hear Heartbeat" as an "other form of perception?" I'm inclined to think the entries for monsters with such abilities reference blindsight to avoid taking up space more than anything else.
As I read it "other forms" are normal defined forms that have normal ways of hiding from them (invisibility, negate aroma, flight) and exotic blindsight-equivalent senses you can hide from. I don't think the idea behind "hear heartbeat" was to work on things that actual blindsight doesn't work on.
Kind of a gray area here but I would treat it "as if it had the blindsight ability". Especially because that feat applies to a narrow set of circumstances to begin with + has a feat tax (kind of, skill focus stealth is not terrible).