Sen. Kay Hagan, NC-D, and Dr. Craig Buchman of University of North Carolina's Department of Otolaryngology Head and Neck Surgery discuss Grayson Clamp's auditory brain stem implant during a press ... more 
Sen. Kay Hagan, NC-D, and Dr. Craig Buchman of University of North Carolina's Department of Otolaryngology Head and Neck Surgery discuss Grayson Clamp's auditory brain stem implant during a press conference at the Carolina Center for Communicative Disorders Program facility in Durham, N.C., Friday, August 23, 2013. Members of the American Cochlear Implant Alliance and the UNC Ear and Hearing Center of UNC Hospitals gave Senator Kay Hagan (D-N.C.) a tour of one of its listening enrichment facilities. The groups want to highlight North Carolina’s commitment to early detection and intervention of hearing loss in children. Joining the tour is 3-year-old Grayson Clamp of Charlotte, N.C., and his parents. Grayson is one of the first children in the U.S. to receive an auditory brain stem implant as part of an FDA-approved investigational trial to help restore his hearing. A video that captured Grayson hearing his father's voice for the first time has garnered more than 1 million views on YouTube. (Sara D. Davis/AP Images for UNC Health Care) less 
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Associated Press
Fri, Aug 23, 2013 1:08 PM EDT