One thing I liked about the Holzer Files, was that they could isolate the relevant sounds from all the white noise, making it easier to hear them.I can never make out these things. I can hear responses though. I know some researches have techniques to slow the recording down and the words become much clearer. It like they are speaking on a higher or faster frequency. You certainly seem to be getting responses. Don’t go by my ability to discern, I can never get them. Trained ears will be able to identify what they are saying I’m sure.