Wow, very interesting,
It sounds like something off the syfy channel, like close encounters or something.
I heard sounds that reminded me of a lot of compressed air or gas forcing itself out like before an erruption.
The second sound reminds of the Noises from hell video that i had on my old paranormal website.
Then my imagination places a whopping big invisable ufo hovering near by or over the areas the noises are heard :) xxx