Probably the latter, that loud noise could disturb the summoning. It would be useless to adventurers to summon a creature that was frightened by loud noises. 
As for the noises they make, I'm sure they're probably as loud as the game makes them out to be. For a real life example, look at chihuahuas. In fact I think carbuncles are bigger than a chihuahua...
As for the noises they make, I'm sure they're probably as loud as the game makes them out to be. For a real life example, look at chihuahuas. In fact I think carbuncles are bigger than a chihuahua...
