In other news, if a live-in infant caregiver (male or female) that you have hired spends more time with the baby than the natural parents do, he/she will recogn

In other news, if a live-in infant caregiver (male or female) that you have hired spends more time with the baby than the natural parents do, he/she will recognize the baby's cries better than the natural parents. Also, parents who adopt an infant child. Or hospital workers in children's ICU. It's simple pattern recognition, just as how an experienced musician might be able to tell when someone else is playing their cowbell ("It has this very particular clonk when hit on the side") better than their non-musical spouse could.