Speech Perception Laboratory

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Peter Assmann

Peter Assmann
Principal Investigator, Professor, School of Behavioral & Brain Sciences
The University of Texas at Dallas Richardson TX 75083
Tel: (972) 883-2435
Fax: (972) 883-2491
Email: [email protected]
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My research is concerned with the perceptual strategies used by listeners to recognize speech. We are developing a database of speech recordings from adults and children ranging in age from 5 to 18 years to study the acoustic scaling transformations that take place as children grow into adults. These recordings provide materials for designing listening experiments, acoustic parameters for realistic voice synthesis and voice conversion, and normative data for studies of speech perception and production in adults and children. Acoustic measurements from the recorded samples are incorporated into statistical models to predict the responses of listeners to natural and synthesized speech. These models provide a basis for testing and refining hypotheses about the perceptual transformations that listeners apply to cope with acoustic variability, and the processes by which they extract phonetic and indexical information in speech perception.

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Michelle Kapolowicz

Michelle Kapolowicz
Ph.D. student in Cognition and Neuroscience
[email protected]
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I am interested in how we are able to adapt to differences in speech production, ranging from variations in indexical properties to understanding speech in distorted listening conditions. My dissertation is focused on exploring the role of spectral information in listeners' ability to adapt to foreign-accented speech. More specifically, I am examining how talker identity cues aid listeners in this adaptation process. I am also involved in ongoing research using vocoded speech to manipulate certain characteristics of the speech signal in children's speech in order to determine which components are most utilized when judging a speaker's age and sex.

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Vahid Montazeri

Vahid Montazeri
Ph.D. student in Communication Sciences and Disorders
[email protected]
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While obtaining my M.S., my research was focused on signal processing, specifically speech enhancement algorithms and speech recognizers. Now working towards my Ph.D., my focus has been expanded to investigate potential mechanisms underlying the perception of speech under adverse conditions in normal hearing individuals as well as cochlear implant recipients. The core of my dissertation research is to study models of speech perception in the presence of background noise and to understand their practical implications towards improving speech enhancement techniques. More specifically, I'm interested in ideal binary masking-based speech enhancement in cochlear implant users.

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Olga Peskova

Olga Peskova
Ph.D. student in Communication Sciences and Disorders
[email protected]

I am interested in development of communication in children with cochlear implants (CIs). My research focuses on the association between mechanisms of speech perception and production in children with progressive hearing losses who received cochlear implantation to restore aspects of their hearing. My previous work focused on the development of speech production in CI recipients, including the influence of phonological errors on speech intelligibility.

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Daniel Guest

Daniel Guest
Undergraduate in Psychology
[email protected]

I am most interested in the acquisition of second languages, particularly in regards to how listeners are able to expand their perceptual capacities to discriminate novel phonemes as they learn a new language in adulthood, as well as theories of grammar, speech perception, and speech production. I'm working right now as an undergraduate research assistant focusing on the lab's work in the identification of gender in vocoded speech of children.

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James Kuang

James Kuang
Undergraduate in Speech-Language Pathology and Audiology
[email protected]

My current research interests include foreign-accented speech and bilingualism, particularly in adult learners of a second language. As a research assistant in the lab, my duties in involve assisting with research involving adaptation for foreign-accented speech perception. I speak Mandarin Chinese, English, and I am currently studying French.

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Alumni

Dwayne Paschall - PhD, 1995
Ginger Stickney - PhD, 2001
David Massey - MS, 2015
Denise Cardenas - MS, 2014
Shaikat Hossain - PhD, 2016 LinkedIn email
Daniel Hubbard - PhD, 2016 LinkedIn email
Sarah Levitt - MS, 2016 LinkedIn email
Adrian Cho - 2016 LinkedIn email