The EVPs

 Jeremiah tells the team to listen closely to the audio files from Peeta and Frodo's equipment.  

Peeta: Do the motion sensors first.  I'm sure we got something there, the way that one kept falling despite being weighted.  (The data comes up on Jeremiah's screen.  It's like a flatlined heart monitor, but the line wiggles slightly before a large jump.  The pattern repeats twice.)  That was me making it stay upright.  We stepped out of range and started doing EVPs.

The line on the screen remains flat, except for rapid bursts of small spikes. 

Jeremiah (to Esperanza, the team rookie): Normal footfalls, like Peeta and Frodo would have made, don't look like that.  Might be small animals.  Remember, we never assume it's paranormal until we've eliminated all other possibilities.  

Peeta: We put down the powder.  No paw prints.  

Frodo:  The EVP we got definitely isn't animals.  Give it a listen.  (To Esperanza) Electronic Voice Phenomena.  

Jeremiah cues up the file.  Frodo is heard asking any spirits to talk to him, then a distorted voice is heard.  The voice is followed by distant childish laughter and Jeremiah pauses the recording for input from the team.  

Frodo: Can't catch me.  

Jeremiah: I hear "fantasy".

Esperanza: No, it's "don't touch me".  

Jeremiah (to Esperanza): You see how we all hear it differently.  That's the norm.  A clear EVP is rare.

The recording continues with the laughter and Frodo asking "who are you?" Jeremiah pauses it again after the voice, or a similar one, responds.

Jeremiah: Antonio?  Did we just get a name? 

Nova: Sounds like "don't I know" to me. 

Frodo: Float my boat.

Hagrid: Broke my nose.

Esperanza: Man, this is nothing like those ghost shows.  They're always like "oh, yes, a kid named Antonio dropped dead in this very spot in 1834".  

Hagrid: They get the history and stuff beforehand, don't they? They're listening for certain things.  It's like that thing with faces, para-doily, but with ears instead of eyes.  This way we'll know it's probably Antonio if we find an Antonio in the history.

Jimin: That's why we avoid places like Lizzie Borden's house - everyone knows that story, everyone has opinions, so they're likely to hear what they want.  (laughs) I saw on one of those shows, they insisted the EVP said "Lizzie killed me" but it sounded to me like "feta cheese".

Ken:  Normally all we can make out is vowel sounds and tone.  It's like back in the day, when everyone was hearing devil messages in records played backwards.  What we do is note what our impressions are and then compare to the history.  

Esperanza: Play that last one, the one from near the log ride. 

Nova: Hey, that's my husband you're bossing around!  (To Jeremiah) Play it.

Jeremiah plays it. 

Jimin: Leave me alone.

Esperanza: Repeat the note.