In my world, creatures evolved in the twilight zone of a tidally locked planet. Naturally, because there is little light, creatures either increased their light sensitivity or turned to other senses, the most common being their auditory sense.
I have originally thought of just larger ears but thought they didn't quite fit with some of my reptile-looking creatures. So I thought of another method, but am not sure if this would work.
Basically, the creatures would have large "plates" on the top of their heads, like that of triceratops.
These "plates" will be structured so that they would be sensitive to vibrations, and there would be many nerves that would pass on these vibrations to the brain.
There are some animals that sense the vibrations of the ground, but I don't know if this would work out for vibrations in the air...
So, in biological terms, is this method of "hearing" possible? If not, could there be any modifications to make this possible?