Mysterious Sound in game - Anyone know what this is??

@Jasonschick80 - same here i did the same when @shatinn asked about it, i wish mine did this. I tried all sorts of things and nothing sigh!! I want this sound gaahhh

Her Alien also makes that sound as you can see in the vid which is weird...

@EgonVM - Question why would she want to repair her game? She likes the sounds and wants more of it. I doubt it's a game thing as it seems like many people don't have it!
She has mods and cc though pretty much as I do. Which is why i am baffled as i don't know where it's coming from and i i want it lol.