Eight-year-old Hailey Pascarelli is now adjusting to a new normal.

"Thank you for helping me be more confident about the surgery," said Pascarelli.

At her annual physical last year, doctors noticed Hailey was failing hearing tests in her right ear. That is when they determined she had completely lost her hearing on that side.

Referred to as Single-Sided Deafness, several tests were conducted to figure out the cause, but it still remains a mystery if it was a sudden loss of hearing or a condition that was developed overtime.

Hailey and her parents then met with Samantha Pepe, AuD, Pediatric Audiologist of Yale New Haven Children's Hospital (YNHCH), who decided Hailey would best served with a cochlear implant.

"Hailey is just a very positive person. She does everything with a smile on her face. She was nervous about the surgery - we all were - but like I said, she went in with a smile on her face. She makes it easy for us," said Amanda Porter, Hailey's mother.

An electronic device was surgically implanted under her skin behind her ear. On the outside, she was given a separate piece which includes a microphone, speech processor and transmitter.

The day Hailey received her device, there was something else planned. The author of her favorite book, "Daisy Doo - All The Sounds She Knew," surprised her with a FaceTime call. The author, Daisy Kent was a former contestant on the show, "The Bachelor." She also has a cochlear implant for hearing loss.

"It's refreshing to see that this gave her what she was expecting and what she wanted. It seems like we're already getting towards reaching her goal," said Samantha Pepe, AuD, YNHCH Pediatric Audiologist.

Watch a video about Hailey's journey.

Learn more about Pediatric Audiology at Yale New Haven Children's Hospital.