Another Strange Sound in an Abandoned Mine

I've become quite interested in watching the Exploring Abandoned Mine channel on YouTube.  I've watched a lot of them and here is another video with a strange occurrence. At 7:32 there appears to be a intercom call. https://youtu.be/yCy8iWxf1Us?t=7m32s

For my cynical mind this seems too perfect. An abandon mine that has no power but he hears haunting echoes of intercom calls so it’s a bit suspect. However if you look at his channel there are hundreds of videos going back 9 years. Very few of them make claims that there is anything spooky going on so making over hyped fake videos is not his focus. He seems to legitimately enjoy mine exploration for the sake of mine exploration.


I can accept some people aren't of my curious mind but if I heard that I would have a hard time leaving.  I would be driven to know what was causing it.  I do agree that mines are extremely dangerous and the thought (as one commenter suggests) that it's a warning call before blasting would certainly concern me.  You never know what the plans are for a place that you're exploring without permission.  I know some States are attempting to collapse abandoned mines to prevent this kind of exploration.


Regardless if it's real or not it is certainly interesting.