Do some dogs start to "talk" as they get older?

My Yorkie came back from the Vet a week or so ago, and ever since then shes been so loud! I can hear her from across the room sighing. Its not even a sigh, its a really light kind of noise a person would make when they stretch? Hard to describe. She isn’t in pain or anything, but she gets bored and makes this noise, makes it when shes tired, etc. I don’t think she realizes that I can hear her, either. Its so strange!
But my Schnauzer used to do this when he got older, too.

Do some dogs begin to mimic “talking” as they get older? Does anyone else have experience with this?