(Newser) – A few weeks ago, 3-year-old Grayson Clamp become the first child in the US to receive something called an auditory brain stem implant, reports CNN. The upshot is that the boy, who was born without a cochlear nerve, was able to hear sound for the first time—as captured on video by the UNC Health Care system. Such implants are available for adults, and Grayson's surgery was part of an FDA trial testing them for kids. In the clip, Grayson hears his dad's voice for the first time. (It's reminiscent of this video of a woman hearing for the first time.)