Noise-induced hearing loss affects hundreds of millions of people globally, with military personnel, construction workers, and concert-goers among the most at risk. While researchers know how the afferent nerve pathway works, far less is known about the efferent nerve system — the brain's feedback mechanism for regulating hearing. BROADCAST TRANSCRIPT:Noise-induced hearing loss affects hundreds of millions of people worldwide, and a group of researchers at Creighton University is working to find new ways to protect it. Hui Hong, an assistant professor at Creighton University, is studying how the brain's feedback system responds to hearing loss, with a focus on hearing disorders and how to treat them. Our research is to study how this even system, responds to noise induced hearing loss condition," Hong said.