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Research Programs

Hearing Instrument Laboratory
Dr. Patrick Plyler

  • Impact of high Hz amplification on subjective and objective benefit in hearing instrument users
  • Effects of expansion on subjective and objective benefit in hearing instrument users
  • Effects of expansion time constants on subjective and objective benefit in hearing instrument users.

Human Auditory Physiology Laboratory
Dr. Ashley W. Harkrider

  • Neurophysiological correlates for perceptual behavior of normal and impaired populations
  • Underlying physiological mechanisms in the cochlea and/or central auditory nervous system responsible for overt behavioral responses to, and perception of, various acoustic stimuli in quiet and in noise

Language and Literacy Lab (L3)
Drs. Ilsa Schwarz and Jillian McCarthy

Neurocognitive Linguistics Laboratory
Dr. Kristin King

  • For individuals both with and without brain injury:
    • Modeling the neural processes
    • Investigating hemispheric processing and neurocognitive skills utilized for linguistic processes
    • Examining the role of cognitive processes on semantic processing
  • Communication and swallowing disorders arising secondary to traumatic brain injury, stroke, neurologic disease, and dementias in both children and adults

Psychoacoustics Laboratory
Dr. Mark Hedrick

  • Perceptual abilities of listeners with hearing loss
  • Speech perception by listeners with normal hearing and listeners with hearing loss
  • Elucidation of frequency and temporal coding mechanisms

Spatial and Binaural Hearing Laboratory
Dr. Patti Johnstone

  • Sound localization ability
  • Spatial release from masking
  • Aided and prosthetic binaural, bilateral, and spatial hearing
  • Hearing loss prevention

Speech Perception and Production Laboratory
Dr. Deborah Von Hapsburg

  • The effect of signal audibility on the emergence of early vocalization patterns in hearing impaired infants.
  • The effects of increasing word familiarity on bilingual speaker’s speech perception in noise
  • Speech perception in noise in [Korean/English] bilingual listeners

Stuttering and Speech Science Laboratory
Dr. Tim Saltuklaroglu

  • Investigations into the neural mechanisms responsible for inducing fluent speech in people who stutter.
  • Examining the role of mirror neuron systems in speech perception and simulated production tasks via electroencephalograpy (EEG).
  • Investigations into clinical efficacy of altered auditory feedback and other treatments for stuttering.
  • Listener reactions to stuttering:
    • Changes in eye-gaze behaviors and physiological responses. How these reactions may in turn affect people who stutter and their communicative interactions.
  • Anticipatory reactions to stuttering in people who stutter. Changes in physiological responses of anxiety in anticipation of stuttered versus fluent speech.
  • The effects of stuttering on manual functions.

See Also: The Stuttering Treatment and Research Center at University of Tennessee

Voice and Speech Science Laboratory
Dr. Molly Erickson

  • Spasmodic dysphoniaAcoustic and physiology of singing
  • Acoustics of cultural diversity
  • Normative data - vocal physiology
  • Experimental phonetics - duration modeling

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