DEPARTMENT OF COMMUNICATION SCIENCES & DISORDERS - FACULTY & STAFF

AUDIOLOGY

 


 


Blas Espinoza-Varas, Ph.D.

Associate Professor

Email Blas Espinoza-Varas
blas-espinoza-varas@ouhsc.edu
(405) 271-4214 ext. 46073


education


Postdoctoral Research Training (Hearing Science), Department of Psychology, McGill University Montreal, Canada, Medical Research Laboratory, USA Navy, New London, Connecticut, 1982

Ph.D. Experimental Psychology (Psychoacoustics), Department of Psychology and Central Institute for the Deaf, Washington University Medical Center St. Louis, Missouri, 1978

M.A. Experimental Psycholog, 1973


Recent publications


Espinoza-Varas, B., Bowman-Edmundson, S., & Jang, H. (2004). Effects of high-frequency amplification and training on impaired-listeners’ ability to discriminate redundant auditory cues. Journal of the Acoustical Society of America, 117 (accepted for publication).

Espinoza-Varas, B., & Jang, H. (2004) Masker variability effects in backward-masked frequency discrimination. Journal of the Acoustical Society of America, 117 (accepted for publication).

Espinoza-Varas, B., Bowman-Edmundson, S. & Jang, H. (2001). Effects of Amplification and Training on Discrimination of Redundant Auditory Cues, ASHA Leader, 6 (15), 71.

Espinoza-Varas, B., & Jang, H. (2004). Discrimination of target frequency increments combined with irrelevant increments in frequency, duration, or level. Perception and Psychophysics (submitted).

Espinoza-Varas, B., & Jang, H. (1997). Sequential interactions in the discrimination of frequency increments co-occurring with irrelevant increments in frequency, duration, or level. Journal of the Acoustical Society of America, 102, 3161.

Espinoza-Varas, B. (1996). Masking additivity in an excitation-pattern model. Journal of the Acoustical Society of America, 99, 2541.

Espinoza-Varas, B., & Watson, C.S. (1994). Effects of decision criterion on response latencies of binary Decisions. Perception and Psychophysics, 55, 190-203.

Boyle, T.A., & Espinoza-Varas, B. (1992). Discrimination of frication-noise duration. International Congress on Acoustics, 3, H6-5.

Espinoza-Varas, B. (1992). Perceiving acoustic components of speech. In: M.E.H. Schouten (Ed.), The Auditory Processing of Speech: From Sounds to Words. (pp. 253-259). Mouton-De Gruyter, Berlin.

Cheung, J.Y., Espinoza-Varas, B., & Shim, C. (1991). Neural networks architectures for systolic arrays. Proc. International Joint Conference on Neural Networks, Washington, Seattle. July 8-12.

Espinoza-Varas, B., & Monahan, C.B. (1991). Discrimination of redundant spectral-temporal cues. I. Journal of the Acoustical Society of America, 90, 2248.

Monahan, C.B., & Espinoza-Varas, B. (1991). Discrimination of redundant spectral-temporal cues. II. Level and duration effects. Journal of the Acoustical Society of America, 90, 2248.

Espinoza-Varas, B., Jessee, T., & Cheung Y.J., (1990). Hearing acoustic details of speech. I. Level discrimination of stop consonant noise bursts," Journal of the Acoustical Society of America, 88, S170.

Espinoza-Varas, B., & Watson, C.S. (1989). Perception of complex auditory patterns by humans. In: R. J. Dooling & S. H. Hulse (Eds.), The Comparative Psychology of Audition: Perceiving Complex Sounds. Erlbaum Assoc., Hillsdale, New Jersey.

Humes, L.E., Espinoza-Varas, B., & Watson, C.S. (1988). Modeling sensorineural hearing loss. I. Model and restrospective evaluation. Journal of the Acoustical Society of America, 83, 188-202.

Espinoza-Varas, B. (1987). Levels of representation of phonemes and bandwidth of spectral and temporal integration. In: M.E.H. Schouten (Ed.), The Psychophysics of Speech Perception. (pp. 80-90). M. Nijhoff, The Netherlands.

Espinoza-Varas, B., & Watson, C.S. (1986). Temporal discrimination for single components of nonspeech auditory patterns. Journal of the Acoustical Society of America, 80, 1685-1694.

Espinoza-Varas, B., & Jamieson, D.G. (1984). Integration of spectral and temporal cues separated in time and frequency. Journal of the Acoustical Society of America, 76, 732-738.

Jamieson, D.G., Slawinska, E., Cheesman, M.F., & Espinoza-Varas, B. (1984). Timing perturbations with complex auditory stimuli. Annual N.Y. Academic of Sciences, 423, 96-102.

Espinoza-Varas, B. (1983). Integration of spectral and temporal cues in discrimination of nonspeech sounds: A psychoacoustic analysis. Journal of the Acoustical Society of America, 74, 1687-1694.


CURRENT TEACHING


Professional Program

CSD 6980 (716): Res. Drs. Dissertation
CSD 6833 (700): Psychoacoustics
CSD 5863 (700): Hearing Science
CSD 5960 (700): Directed Readings in Com. Dis.
CSD 5990 (716): Special Studies Comm. Disorders
CSD 6980 (716): Res. Drs. Dissertation
CSD 6833 (700): Psychoacoustics


GRANTS


“Sensorineural hearing loss and high-frequency amplification” Presbyterian Health Foundation, $30,000.00 for 7/1/2005-6 /30/2006. PI: B. Espinoza-Varas

"Auditory attention deficits in older adults," Oklahoma Center for the
Advancement of Science and Technology, $119,502 for 6/1/2005-5/31/2008. PI: B. Espinoza-Varas.


SERVICE


"Cortisol effects on human auditory discrimination. I” Co-Investigator with William R. Lovallo. NIH NIAAA $ 6,200 for 1-15-04 to 5-15-04. Budget figure includes stipend, subject fees, drugs, saliva essay.

" Cortisol effects on human auditory discrimination. II” Co-Investigator with William R. Lovallo. NIH-NIAAA $ 7,000 for 6-1-04 to 10-31-04. This is a follow up of the above contract.


RESEARCH INTEREST/CLINICAL EXPERTISE


Research Interest

  • Auditory processing in hearing-impaired patients
  • Auditory attention deficits in older adults
  • Cortisol effects on auditory information processing
  • Processing of irrelevant auditory information in young and older adults
  • Auditory processing rate in normal and hearing-impaired young adults
  • Auditory training in sensorineural hearing impaired patients

PROFESSIONAL ORGANIZATIONS


  • Acoustical Society of America
  • Audio Engineering Society
  • American Speech, Language, & Hearing Association
  • American Auditory Society

DEPARTMENT SPOTLIGHT

 

 

 

 

 

 

CONTACT INFORMATION


Department of Communication Sciences & Disorders

University of Oklahoma Health Sciences Center
PO Box 26901, Oklahoma City, OK 73104
Phone: (405) 271-4214, Email: Department Contact

 
 
   

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