The moment Artie Porter turned his head toward his mother's voice, Emily Porter felt something she had waited years to witness. For the first time in their young lives, her twins could hear her.

Artie and his brother Jack were born prematurely due to a genetic condition that left them profoundly deaf—so deaf that a fire engine blaring beside their heads would have registered as silence. But in April, in what is believed to be the first surgical program of its kind in Australia, ENT surgeon Rithvik Reddy performed an eight-hour operation placing four cochlear implants across four ears, operating on both boys simultaneously.

The decision to do both twins at once was deliberate. By combining the surgeries, Reddy minimized the strain of repeated pre- and post-operative preparations on the family—and gave the boys a milestone they could share. A cochlear implant is a small device that transmits sound directly to the hearing nerve, bypassing the ear entirely. It sits under the skin, held in place by a magnet connecting to an external unit mounted above the ear.

After recovery, Artie and Jack traveled to the Shepherd Center, a New South Wales-based provider specializing in childhood hearing loss, where their implants were calibrated and activated. The moment the devices turned on, their world shifted.

"It was incredible and emotional," Emily Porter told ABC News AU. "For them to turn their head to the sound of my voice and see their little eyes widen at the sound of that was just, it's just mind-blowing."

Her husband Ewan shared the wonder. "They smile… you can tell that they're understanding what you're saying. You're talking to them… it really is a gift and a miracle."

The surgery arrives at a pivotal moment for families across New South Wales. Unlike other Australian states, NSW has historically directed less funding toward cochlear implant assistance. When ABC News raised this disparity with the NSW government, Health Minister Ryan Park responded with a commitment: AUD$20 million would be allocated in the next budget to organizations like the Shepherd Center, specifically to help parents afford implants and surgery for children like Artie and Jack.

"These kids deserve the very best start to life and we're hopefully playing a role in delivering that for them and their families," Park said.

The journey ahead is long. Artie and Jack will need extensive therapy throughout their childhood. But each morning now, their parents Ewan and Emily—joined by older brother Tommy—will get to switch on their implants and welcome them back into the world of sound. For the Porter family, that world sounds like possibility.