John H. Grose, PhD

John H. Grose, PhD, is the Principal Investigator on an NIH-funded project that examines complex sound processing in normal and impaired ears. Most everyday listening environments consist of a multitude of sounds, many of which are fluctuating in level over time. The way in which the brain sifts apart this acoustic complex into its constituent sound sources is referred to as auditory perceptual organization. The root interest of Dr. Grose’s project is to understand the role that temporal processing plays in perceptual organization and how impaired auditory systems compromise this ability. The current focus of this project is on delineating the specific types of temporal processing deficits that emerge early in the aging process, and on differentiating these from deficits associated with advanced age and cochlear hearing loss. Three areas of temporal processing are being investigated: (1) stimulus onsets and temporal fine structure; (2) temporal envelope coding; and (3) the relationship between temporal envelope processing and spectral integration in modulated maskers. The project utilizes both psychophysical and electrophysiological methodologies, and incorporates both speech and non-speech measures.

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.