I am 7 weeks out and my belly still talks to me, it is everytime I eat or drink. it has never been loud enough that anyone hears it but I feel it everyday. Not sure if it ever goes away, I have gotten used to it and just tend to ignore it.
I had lap RNY and my stomach rumbles on and off all day, doesn't seem to be related to food or drink, BUT it is not loud enough for anyone else to hear. You may just have to wait and see. Good luck.