WATCH: What a reaction as infant finally hears his mom!

Baby boy Jordan Blair was born deaf. He failed two newborn hearing assessments while in the hospital.

His mom explained, "We were then referred to an ENT and audiologist to confirm the loss as hearing loss runs on my side of the family. He then got bronchiolitis at three weeks old and ended up in hospital for nine nights and this caused fluid build-up in his ears."

But things got much better for the Australian three-month-old.

It happened when he was fitted with hearing aids.

Last week, he finally heard the sound of a rattle and the sweetest sound -- his mother's own voice for the first time - and he couldn't help giggling!

The video shows Jordan hearing for the first time after his hearing aids were switched on.

His mom summed up the emotional roller coaster, "In his short life, we have already been to 22 appointments as well as hospital and most of this time screaming and him in pain so you can imagine it was lovely to go to this appointment as see him laughing and cooing like a 'normal' baby should."