John H. Grose, PhD, is the Principal Investigator on a long-running NIH-funded project that examines complex sound processing in normal and impaired auditory systems. He studies this in humans using both psychophysical and electrophysiological approaches. The current focus is on understanding the decline in temporal processing with age, particularly in ears that retain a normal audiometric profile. Dr. Grose is also Principal Investigator on a project funded by the Fogerty International Center of the NIH. The goal of this project, which is in its final stages, was to establish a line of collaborative work with a laboratory at the Universidade Federal de Pernambuco (UFPE) in Recife, Brazil. Much of the focus has been on equipping and developing the UFPE lab, and in implementing a project aimed at understanding aging effects in masking release for both speech and non-speech stimuli. Finally, Dr. Grose is Principal Investigator on a new two-year project funded by the Hearing Industry Research Consortium – a consortium supported by all the major international hearing instrument manufacturers. This project investigates ‘hidden hearing loss’ associated with loud music exposure. The goal is to determine whether a history of loud music exposure results in supra-threshold hearing deficits even though the audiogram remains unaffected.

In addition to his major research emphasis, Dr. Grose is active clinically in the evoked potential testing of infants and toddlers, as well as patients with cochlear implants.