School of CommunicationNorthwestern University Text only version
Student Portrait studies in the arts and sciences of communication
Principal Investigator: Sumit Dhar
s-dhar@northwestern.edu

Research Assistant: Kathleen Dunckley
k-dunckley@northwestern.edu

Research Technologist: Rebekah Abel
r-abel@northwestern.edu


Lab Location: Frances Searle Building 1-254,
Lab Phone: (847) 467-0123

[Link to lab website for more information]



Overview

  • Cochlear Mechanics: Generation mechanisms of otoacoustic emissions.

  • Novel clinical applications of otoacoustic emissions.

  • Efficacy of modern-day amplification technology.

  • Papers Related to Lab Projects

    [Link to lab website for more full list and reprints]

    Withnell, R.H., Dhar, S., Thomsen, A.M. (2005). A comparison of OAEs arising from different generation mechanisms in guinea pig. Hearing Research: 207, 76-86.

    Dhar, S., Long, G.R., Talmadge, C.L., Tubis, A (2005). The effect of stimulus-frequency ratio on distortion product otoacoustic     emission components. Journal of the Acoustical Society of America: 3766 - 3776.

    Dhar, S., Humes, L. H., Calandruccio, L., Barlow, N. B., Hipskind, N. (2004). Speech-In-Noise Performance from Real Ear Measures of Directional Hearing Aids. Ear and Hearing: 147-158.

    Dhar, S., Shaffer, L. A. (2004). Effects of a suppressor tone on distortion product otoacoustic emissions fine structure: Why a universal suppressor level is not a practical solution to obtaining single-generator DP-grams. Ear and Hearing: 573-585.

    Shaffer, L.A., Withnell, R.H., Dhar, S., Lilly, D.J., Goodman, S.S., Harmon, K.M. (2003). Sources and Mechanisms of DPOAE Generation: Implications for the Prediction of Auditory Sensitivity. Ear and Hearing: 367-379.

    Dhar, S., Talmadge, C.L., Long, G.R., Tubis, A. (2002). Multiple internal reflections in the cochlea and their effect on DPOAE fine structure. Journal of the Acoustical Society of America: 2882-2897.

    Tubis, A., Talmadge, C. L., Tong, C., Dhar, S. (2000). On the relationship between the fixed-f1, fixed-f2, and fixed-ratio phase derivatives of the 2f1-f2 distortion product otoacoustic emission. Journal of the Acoustical Society of America: 1772-1784.

    Strickland, E. A., Dhar, S. (2000). Ques for discrimination of QFM noise from random noise. Journal of the Acoustical Society of America: 735-742.

    Ricketts, T., Dhar, S. (1999). Comparison of performance across three directional hearing aids. Journal of the American Academy of Audiolgy: 180-189.

    Talmadge, C. L., Long, G. R., Tubis, A., Dhar, S. (1999). Experimental confirmation of the two-source interference model for the fine structure of distortion product otoacoustic emissions. Journal of the Acoustical Society of America: 275-292.

    Dhar, S., Long, G.R., Culpepper, N.B. (1998). The dependence of the distortion product 2f1-f2 on primary levels in non-impaired human ears. Journal of Speech-Language and Hearing Sciences: 1307-1318.

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