Andrew Lotto, PhD

Room: 232
Office Phone: (520) 626-7530
Email: alotto@email.arizona.edu

Our lab (the Auditory Cognitive Science Lab or ACSL) conducts research on a variety of projects related to the perception of complex sounds such as speech and music.  We utilize behavioral and neurophysiological methods along with computational models to develop theories on how the auditory system encodes, processes, and interprets meaningful sounds.  Current projects include using high-density EEG to examine the resources brought to bear when listening to degraded speech; investigating whether the ability to “tune” one’s perception to the characteristics of a particular speaker is helpful for normal speech perception, simulating the effects of cochlear implant processing on running speech, and testing classic models of spoken word recognition.  We are also conducting studies measuring various acoustic attributes of speech production.  Student projects tend to be true independent studies as opposed to small parts of a larger project.

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Useful Links:
Auditory Cognitive Science Society

Barbara Cone-Wesson, PhD

Room: 310
Office Phone: (520) 626-3710
Email: conewess@email.arizona.edu

My research focuses on human auditory system development and the evaluation of hearing status using electrophysiologic methods.  Auditory evoked potentials are the “brain waves” evoked by sound.  We use auditory evoked potentials from the auditory nerve, brainstem and cortical auditory pathways to document detection, discrimination and perception of sound.  Current projects are:

1) Parametric investigation of auditory steady-state potenstials for estimating threshold.
2) Parametric investigation of obligatory event-related potentials for detection, discrimination and perception of speech.
3) Parametric investigation of obligatory event-related potentials for detection, discrimination and perception of speech.
4) Obligatory and cognitive event-related potentials as measures of binaural hearing capabilities.

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Dianne Van Tasell, PhD

Room: 207A
Office Phone: (520) 621-5797
Email: dvt@email.arizona.edu

My research interests and experience lie mainly in the areas of hearing aids, including signal processing and fitting methods.  From time to time I carry out sponsored work in collaboration with hearing aid manufacturers to test new products, or to develop new methods for fitting and verification.  Student participation in this work would be welcome.

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Jungmee Lee, PhD

Room: 207C
Office Phone: (520) 626-5083
Email: jmlee6@email.arizona.edu

My research focuses on understanding mechanisms of human auditory system to process spectral and temporal information of sounds through behavioral measurements, psychoacoustics, for normal-hearing and hearing impaired population.  My current research project is focused on understanding a temporal integration process of the auditory system of time-varying sounds like amplitude modulated sound and frequency modulated sound.  This project outcome will contribute significantly on understanding the auditory process of speech.  I am planning to extend the research to study a potential relationship between auditory temporal process deficit and speech/language deficits.

Another project focuses on comparing the behavioral measurements with otoacoustic emissions and electrophysiological measurements to understand the impacts of envelope information on sound perception.  These different measurement methods will provide an insight of how different levels of auditory system process the same auditory information.

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Useful Links
Click here for a list of Dr. Lee's Education and Selected Publications.

 

Theodore Glattke, PhD

Room: 236
Office Phone: (520) 621-7065
Email: glattke@email.arizona.edu

Research efforts in applied auditory physiology are designed to address questions related to the application of auditory electrophysiological responses and otoacoustic emissions to clinical problems.  We have recently published the most comprehensive study to date on the use of transient otoacoustic emissions (TEOAEs) to detect hearing loss in children and young adults.

Projects currently under way include: (a) optimization of stimulus parameters to detect hearing loss in adults using distortion project otoacoustic emissions; (b) central masking effects on auditory brain stem responses; and 8 comparisons of synchronized and non synchronized spontaneous otoacoustic emissions.  We participate in the National Consortium for Newborn Hearing Screening.  A number of opportunities exist to conduct projects in cooperating medical centers throughout the country.

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