#Unseen and Unheard
A key aspect here is the phrase:
You can’t hide from a creature that can see you clearly...
This is the implication that if they have a means to perceive you, then they will perceive you. You can be situated behind a wall and attempt to Hide, but if a creature has tremor sense, they're going to sense your location that way.
There are many iterations of ways to perceive a creature and Hiding - and they're generally be adjudicated by the senses of the creature looking for you and how/where you're hiding.
##General vs Specific In general, hiding is unseen and unheard (as shown in your quotation about being revealed upon an attempted attack.), but specific rulings will come into play depending on the circumstances and the ability of the creature detecting you.