I had two does that made a ton of noise when we first brought them home because of course, they were upset and trying to reassure each other. The first day we had them, we though we had made a big mistake. After the first day or two, they quieted down a lot. They would still be noisy when they wanted attention or food, but they weren't that bad.
When they had kids, the kids would naturally hide themselves in any little space they could find. When their mama couldn't find them, she would call out for them until she did manage to find them. We would go out, drag the babies from their hiding spot (they loved to get under the bbq grill and fall asleep), and give them back to their mama just so she would shut up because the kids just ignored her calls.
When it was milking time in the morning, the goats would let me know. Ours were shut up in a smaller area at night and they would definitely make enough noise in the morning to wake me up (their house was right next to my bedroom window). I didn't want them waking the neighbors so I never let them cry for very long before I let them out and did milking (usually around 6am).
When it was time to sell the kids we weren't keeping, things were great until the second boy got picked up. That doe was upset about her babies being gone and let everyone know it. She called and cryed for them all night, but luckily it was only one night. We didn't have that issue with our other doe because we had boarded our goats with the lady that was buying her kid while we were on vacation. She separated them while we were gone so she was used to not having her kid around by the time we picked them up.
It seemed like the amount of noise they made went in stages. They were very quiet once the settled in and until the kids were born. There was a fair bit of noise when the kids were little and then it settled down again as the kids got older. When the does started going into heat again, one of them would be really noisy, sometimes in the middle of the night; just all of a sudden. Once the were re-bred, it would quiet down again. For us, the noise did get to be a problem because we are in the middle of a normal, residential neighborhood where the houses are pretty close together and I always worried we were going to bother the neighbors too much. Ultimately, we sold our goats due to a number of reasons, noise only being a small one. Mostly my husband was just tired of hearing me say... "I can't do that, I have to get home and do milking", and our property doesn't work well for goats because they weren't able to have their own space during the day so they spent most of their time on our patio and my husband was tired of cleaning up pee and poop just so we could sit outside. I still love goats and do plan to have them again someday when we have a property that works better for them. Good luck in your decision!
ETA: Compared to the eight hens I have now, I think the goats made noise less often (unless there was something going on like taking kids away or a doe in heat), but the noise seemed to be greater when it did occur.
