Faculty listed by Research

Sandra Gordon-Salant

Professor

UMD Hearing and Speech 0119 LeFrak Hall

301-405-4225

sgordon@hesp.umd.edu

Research Interests :

The aging auditory system is characterized by anatomical alterations in peripheral and central structures. Aging is also accompanied by decline in cognitive processes. While many deficits in perception are attributed to peripheral hearing loss, there remain age-related alterations in processing of signals beyond those that are associated with sensitivity loss. The focus of this laboratory is investigation of the consequences of aging and hearing loss on auditory performance. Our work has shown that age-related deficits, independent of hearing loss, are primarily observed on measures of auditory temporal processing. The strategies employed include evaluation of behavioral performance on speech perception and psychoacoustic tasks, as well as electrophysiologic indices that alter stimulus timing or presentation rate.

Animals :
Campus Institute :
Lab :

UMD Hearing Lab


Samira Anderson

Assistant Professor

Hearing and Speech Sciences 0100 Lefrak Hall

301 405 4224

sander22@umd.edu

Research Interests :

We are interested in neural processing of auditory input across the life span. In infants, we study the development of speech sound differentiation and the relationship between subcortical speech encoding and later language development. This information may lead to earlier identification and treatment of language-based learning impairments. In older adults, we are investigating the effects of aging and hearing loss on the ability to understand speech in complex environments. As we age, we begin to notice a gradual decrease in our ability to process incoming stimuli, in part due to slower speed of processing. These changes are exacerbated by hearing loss and deficits in cognitive abilities, such as memory and attention. The basic test of hearing thresholds does not accurately predict hearing in noise. We use electrophysiology assessment techniques to assess the brain’s ability to accurately encode the timing and frequency components of speech in humans. We also evaluate plasticity in the auditory brainstem and cortex in response to sensory deprivation, augmented hearing, and auditory training. The use of hearing aids or cochlear implants cannot compensate for imprecise neural speech encoding; therefore, it is important to consider other rehabilitation approaches that focus on the use of auditory and/or cognitive training to improve speech understanding. The information gained from our research should lead to better methods of identification and management of hearing difficulties in older adults.

Animals :Humans
Campus Institute :
Lab :

Hearing Brain Lab