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Little Grayson makes progress with auditory implant

3-year-old making progress after implant lets... 02:55

(CBS News) DURHAM, N.C. -- Three-year-old Grayson Clamp was captured on video hearing the voice of his father, Len, for the very first time.

Grayson and mom Nicole
Grayson and mom Nicole CBS News

Grayson was born without the nerve that helps connect the ear to the hearing center in the brain. In April, he became the first child in the U.S. to receive an auditory brain stem implant as part of an FDA-approved clinical trial.

The device on his ear collects and transmits sound through wires threaded through the skull. Those wires connect to an implanted electrode that sits in the brain stem.

Grayson plays with Dr. Jon LaPook.
Grayson plays with Dr. Jon LaPook. CBS News

Five months have gone by since the operation.

Nicole Clamp
Nicole Clamp CBS News

"It's like a little miracle every time he hears something, to me," says his mother, Nicole. "But he's starting to develop speech."

The Clamps became Grayson's foster parents when he was seven weeks old. About a year later, they learned he was completely deaf. Shortly after getting the news, the Clamps were given the option to adopt Grayson.

Nicole says she and Len had no misgivings about going ahead with the adoption after learning Grayson was profoundly deaf.

"We talked about what kind of parent does a deaf child need," she says. "Do they need to be with deaf parents? Do they need to be with hearing parents? What's the best situation for him? And it seemed like it was to stay with us."

Dr. Craig Buchman
Dr. Craig Buchman CBS News

Grayson had worked his way into their hearts.

Grayson's teachers say he spontaneously says a few words, like "up," "go" and "bye-bye." He also just learned one new word.

"Ball -- and I know that because I told him to go get the ball, and he just went and got it," Nicole says.

Despite this kind of progress, Grayson has a lot of catching up to do. Since he was a toddler, he's been communicating with hand gestures. Now he has to link sounds with their meaning, one word at a time.

Watch: Three-year-old hears for the first time in his life, below.

Dr. Craig Buchman of the University of North Carolina performed the surgery. Asked how he thinks Grayson might progress in the future, Buchman says, "I just don't know, honestly."

"I mean, we're going to have to see where he goes," he says. "I mean, I'm really, really hoping for him to develop meaningful spoken language."

Nicole says she doesn't want Grayson to be just a normal kid and young man, like other parents want for their children.

"I don't want him to be normal, actually," she says. "I want him to be extraordinary."

To anyone who's met Grayson, he already is.

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