Hearing & Amplification
Research Laboratory



Research in the Auditory and Perception (AMP) lab aims to describe how amplification affects the perception of sound. The goal is to use hearing-aid amplification as a tool to better understanding the mechanisms that contribute to auditory perception. The results from our research will help to maximize outcomes for children and adults with hearing loss.


The AMP lab is located at Boys Town National Research Hospital in Omaha, Nebraska. The facilities include a double-walled sound treated audiometric test booth with a hearing-aid verification system, multiple speakers, and other equipment for stimuli playback and control.


The lab is under the direction of Marc A. Brennan, Ph.D., and is supported by grants from the National Institutes of Health. Alex Baker, B.S., is a research assistant in charge of operating the lab. Collaborators include Emily Buss, Ph.D., Ben Kirby, Ph.D., Walt Jesteadt, Ph.D., Dawna Lewis, Ph.D., and Ryan McCreery, Ph.D.

Summary of Research Program

For Clinicians and Scientists

Speech recognition is a complex process that depends on many factors. The framework for our research is to increase our understanding of the influence of hearing-aid amplification on measures of temporal and spectral resolution. This information will increase our understanding of the mechanisms that contribute to auditory perception. By gaining an understanding on the influence of amplification on measures of temporal and spectral resolution, we can then start to modify prescriptive procedures to incorporate these measures, potentially leading to improved speech recognition.

For Families

The goal of our research is to understand how children and adults perceive sounds. We can then apply this new knowledge towards the development of tools that improve the ability of listeners with hearing loss to understand speech.