Faculty

Tiffany A. Johnson

Associate Professor

Phone: (913) 588-5937 (office)
Phone: (913) 588-5929 (lab)
Fax: (913) 588-5923
tjohnson7@kumc.edu

B.A., 1992, Creighton University
M.A., 1995, University of Iowa
Ph.D., 2003, University of Iowa
NIH Post-Doctoral Fellow, 2003-2006, Boys Town National Research Hospital

Director, Auditory Research Laboratory

Research Interests

Dr. Johnson's research focuses on understanding how the human auditory system works in ears with both normal hearing and hearing loss.  Research in the lab includes basic investigations of human auditory system function using non-invasive techniques (otoacoustic emissions, auditory evoked potentials, behavioral approaches).   Translational studies aimed at improving the identification and diagnosis of hearing loss in infants and young children are also underway.  We have received support in the past from the American Academy of Audiology Foundation and the American Speech-Language-Hearing Foundation. We are currently supported by a grant from the National Institutes of Health - National Institute on Deafness and Other Communication Disorders.

Selected Publications

Johnson, T.A. & Baranowski, L.G. (2011) The influence of common stimulus parameters on distortion product otoacoustic emission fine structure, Ear and Hearing, in press.

Johnson, T.A.  (2010) Cochlear sources and otoacoustic emissions. Journal of the American Academy of Audiology, 21, 176-186.

Brown, C.J. & Johnson, T.A. (2010).  Electrophysiologic assessment of hearing.  In Flint, P.W., Haughey, B.H., Richardson, M.A., Robbins, T., Thomas, R., Niparko, J.K., & Lund, V. (Eds.), Cummings Otolaryngology-Head and Neck Surgery (5th Ed.), Mosby, Philadelphia, pp. 1904-1915.

Johnson, T.A., Neely, S.T., Kopun, J.G., Dierking, D.M., Tan, H., & Gorga, M.P. (2010).  Clinical test performance of distortion product otoacoustic emissions using new stimulus conditions. Ear and Hearing, 31, 74-83.

Neely, S.T., Johnson, T.A., Kopun, J., Dierking, D., & Gorga, M.P.  (2009). Distortion-product otoacoustic emission input/output characteristics in normal-hearing and hearing-impaired human ears.  Journal of the Acoustical Society of America, 126, 728-738.

Vander Werff, K.R., Johnson, T.A., and Brown, C.J. (2008).  Behavioral threshold estimation.  In Rance, G. (Ed.), The Auditory Steady State Response:  Generation, Recording, and Clinical Application.  Plural Publishing, San Diego, pp. 125-147.

Johnson, T.A., Gorga, M.P., Neely, S.T., Oxenham, A.J., & Shera, C.A. (2008).  Relations between otoacoustic and psychophysical measures of cochlear function.  In Manley, G.A., Fay, R.R. and Popper, A.N. (Eds.), Active Processes and Otoacoustic Emissions in Hearing.   Springer Science+Business Media, LLC, New York, pp. 395-420.

Johnson, T.A., Neely, S.T., Kopun, J.G., Dierking, D.M., Tan, H., Converse, C., Kennedy, E., Gorga, M.P. (2007).  Distortion product otoacoustic emissions: Cochlear-source contributions and clinical test performance.  Journal of the Acoustical Society of America, 122, 3539-3553.

Johnson, T.A., Neely, S.T., Kopun, J.G., Dierking, D.M., Tan, H., Converse, C., Kennedy, E., Gorga, M.P. (under review). Distortion product otoacoustic emissions: Cochlear-source contributions and clinical test performance. Journal of the Acoustical Society of America.

Johnson, T.A., Gorga, M.P., Neely, S.T., Oxenham, A.J., & Shera, C.A. (2007). Relations between otoacoustic and psychophysical measures of cochlear function. In Manley, G.A., Fay, R.R. and Popper, A.N. (Eds.), Active Processes and Otoacoustic Emissions in Hearing. Springer Science+Business Media, LLC, New York, in press.

Gorga, M.P., Neely, S.T., Johnson, T.A., Dierking, D., & Garner, C. (2007). The relation between distortion product otoacoustic emissions and hearing loss. In M.S. Robinette & T.J. Glattke (Eds.), Otoacoustic Emissions: Clinical Applications (3rd Edition). Thieme Medical Publishers, Inc., New York, 197-225.

Johnson, T.A., Neely, S.T., Kopun, J.G., and Gorga, M.P. (2006). Reducing reflected contributions to ear-canal distortion product otoacoustic emissions in humans. Journal of the Acoustical Society of America, 119, 3896-3907.

Gorga, M.P., Johnson, T.A., Kaminski, J.K., Beauchaine, K.L., Garner, C.A., & Neely, S.T. (2006). Using a combination of click- and toneburst-evoked auditory brainstem response measurements to estimate pure-tone thresholds. Ear and Hearing, 27, 60-74.

Johnson, T.A., Neely, S.T., Garner, C.A., & Gorga, M.P. (2006). Influence of primary-level and primary-frequency ratios on human distortion product otoacoustic emissions. Journal of the Acoustical Society of America, 119, 418-428.

Gorga, M.P., Dierking, D.M., Johnson, T.A., Beauchaine, K.L., Garner, C.A., & Neely, S.T. (2005). A validation and potential clinical application of multivariate analyses of DPOAE data. Ear and Hearing, 26, 593-607.

Johnson, T.A. & Brown, C.J. (2005). Threshold prediction using the auditory steady-state response and the toneburst auditory brainstem response: A within-subject comparison. Ear and Hearing, 26, 559-576.