Aria drains out the background noise. And her ears prick out; searching for the  softer sounds she heard. 

Is that wind? Voices? 

Some kind of heaving...

After listening for a few more seconds she notices the ryhtmic heaving, which means it was breathing. About the wind coming from deeper in the cave. Perhaps there is another entrance of the cave where the wind washes into the cave. Or maybe it really was just the breathing making the wind. Or perhaps the other way around. 

She closes her eyes trying to look for another clue. Voices, but Aria frowned. She could not recognize the language. It way different, and it left her skin tingling.

"Well I guess Fenrir does have a point."