That voice. He knows that voice. It makes Donnie feel a lot better about things because it means he's going in relatively the right direction. He takes care in his crawling so he doesn't accidentally bang against anything because if sound can travel one way it can certainly go the other.

At least trying to make out what 'Konrad' is saying helps distract him from other horrifying thoughts through the red shaftway. What's all this about food and supplies? Sounds like their intervention here might be a timely one if what he's gathering is correct...

He squints ahead as he thinks he sees some light streaming through, which hopefully means an opening of sorts.