Grayson ClampA breakthrough medical trial here in the U.S. has allowed a three-year-old boy to hear for the first time.

Grayson Clamp is the first child in the U.S. to have an auditory brain stem implant.

About 1,000 people in the world have auditory brain stem implants. They were first used in humans in 1979.

Grayson Clamp’s parents tried everything to help their deaf 3-year-old son hear, but when a cochlear implant failed to fix his auditory disability, Len and Nicole Clamp turned to an untested method that had never before been used on children in the United States…an “auditory brain stem implant.”

After the chip was implanted, Grayson – who was adopted by the Clamps as a newborn after he was placed in foster care – could hear for the first time in his life.

Check it out in the amazing video below.