Tests to detect hearing loss measure the ability of sound vibrations at different frequencies to reach the brain. Hearing tests measure the ability to hear either air-conducted sounds (sounds that reach the inner ear through the ear canal) or bone-conducted sounds (sounds transmitted through bones in the ear and skull). Susan Small received a 2001 MSFHR Trainee Award to study an emerging method for testing hearing focused on auditory steady-state responses (ASSRs), which objectively measure response to sound stimuli. Studies show that ASSRs can accurately estimate hearing levels for air-conducted sounds. However, there is no data on the effectiveness of ASSRs in measuring hearing levels in infants for bone-conducted sounds. Susan is building on her earlier research by estimating bone-conduction hearing thresholds for infants when using ASSRs. Results from this research could improve hearing assessments and early diagnosis of hearing loss in infants.