I read this as Au Ra Horn Headcannons, and my first thought was Fuck. Yes. Laserhorns.
As for the actual horns, well. I had a character in an unrelated RP years and years ago that had horns made into her skull as part of an experiment with her family. The way the horns worked is that they were like hollow carapace with hardened outer shell. The idea was that they took in vibrations through the air through very tiny openings in the horns that led into the hollow cavity, enhancing her ability to hear and feel those vibrations to identify things. In a sense similar to, but not quite echolocation. More like one half of it. I imagine if an Au Ra's horns got broken at the end, they would not be able to filter out sounds, and it would be like a bullhorn going off in their 'ear' constantly until they covered it with something or it grew back (can they grow back? can they be healed with conjury?).
As for the actual horns, well. I had a character in an unrelated RP years and years ago that had horns made into her skull as part of an experiment with her family. The way the horns worked is that they were like hollow carapace with hardened outer shell. The idea was that they took in vibrations through the air through very tiny openings in the horns that led into the hollow cavity, enhancing her ability to hear and feel those vibrations to identify things. In a sense similar to, but not quite echolocation. More like one half of it. I imagine if an Au Ra's horns got broken at the end, they would not be able to filter out sounds, and it would be like a bullhorn going off in their 'ear' constantly until they covered it with something or it grew back (can they grow back? can they be healed with conjury?).