When exploring around the Mojave I occasionally hear a strange noise, I can't really describe the sound well but it sounds like splashing, I tend to hear it when Cazadors arre nearby but the noise sounds like it is right beside my character, this noise has become more prevelant when playing Honest Hearts as well.

Does anybody have any answers regarding this noise? Will it be patched and what exactly this audio is for in the game?

It's something being poisoned by cazadores. With the new patch, you will only hear it when you are nearby something that is poisoned.

Oh I see, I did'nt know there was a new patch out, glad to have it fixed, that noise would scare the crap out of me when I was out for a walk XD