The little girl from Idaho was born profoundly deaf and fitted with two tiny hearing aids for the first time this week.
Annabelle reacts with wide-eyed surprise to hearing sounds for the first time - most importantly the voice of her mother Sarah-Jo.
"Can you hear?" she asks her daughter, whose whole face shows her wonder at hearing the words.
Sarah-Jo and the audiologist watch Annabelle’s astonished reaction to voices and hands clapping nearby.
"Everything has been so overwhelming," Sarah Jo told the Metro. "To be able to tell Annabelle that I love her and know she hears me is very emotional."
Mum and baby are both now enjoying this new way of communicating: "I can’t stop talking to her. Whenever I’m doing the dishes or putting a wash on I give her a running commentary."
Annabelle will be fitted with cochlear implants when she is nine months old.