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 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.
Five months have gone by since the operation.
"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.