Ten-month-old Amir Hayden sits on his mother’s lap inside a sound-proof booth at UCSF Benioff Children’s Hospitals audiology clinic in Oakland, as audiologist Sarah Coulthurst, MS, takes him through a ...

Ben Summers lights up with a smile the moment he talks about the “Batman” theme song or the afternoons he spends playing the piano at his grandmother’s house. Just a few years ago, Ben could not hear ...