User blog comment:FairyRaven/Fairy Tail Chapter 329: Seven Dragons, Review and Commentary/@comment-4829046-20130430111358/@comment-7418318-20130430123121

I think the "I can hear it" was just a little service line for the fans, rather than him being litteral... especially since Cobra didn't say anything untill after that line.

But you're probably right about his nose. I forgot that Natsu didn't see how many Dragons came through the door.