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Karolina Charaziak, PhD

Assistant Professor of Otolaryngology-Head and Neck Surgery

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Overview

Karolina Charaziak, Ph.D. is an Assistant Professor in the USC Caruso Department of Otolaryngology–Head and Neck Surgery. Her research focuses on cochlear mechanics, particularly the generation of otoacoustic emissions, temporal processing in the inner ear, and the effects of sensory hearing loss on cochlear function.

Dr. Charaziak earned her Ph.D. in Communication Sciences and Disorders from Northwestern University in 2014. She completed postdoctoral fellowships at Harvard Medical School’s Massachusetts Eye and Ear Infirmary and at USC. Her earlier education includes an M.S. in Acoustics and a B.S. in Hearing Care and Noise Control from Adam Mickiewicz University in Poland.

She has received several honors, including the NIH Pathway to Independence Award (K99/R00), a Dean’s Pilot Funding Program Award from the Keck School of Medicine, and travel awards from the Acoustical Society of America and the American Auditory Society.

Dr. Charaziak teaches courses on neuroanatomy and neurophysiology related to speech, language, and hearing. She is actively involved in professional organizations, serving on committees for the Association for Research in Otolaryngology (ARO) and contributing as a reviewer for journals such as Ear and Hearing and the Journal of the Acoustical Society of America.

#Courses

OHNS 500, Neuroanatomy and Neurophysiology in Speech, Language and Hearing (Y1, Fall Semester)

Research Funding

  • The role of nonlinearity and dispersion in spatiotemporal processing in the cochlea
    NIH · R01DC022942 · May 7, 2026 – Apr 30, 2031 · Role: Principal Investigator
  • Gain-sensitive cochlear microphonics – a diagnostic test of functional and physiological effects of sensory hearing loss
    NIH · R21DC021794 · Sep 19, 2024 – Aug 31, 2026 · Role: Principal Investigator
  • Understanding the dynamics of cochlear amplification
    NIH · R00DC016906 · Dec 1, 2021 – Nov 30, 2024 · Role: Principal Investigator
  • Understanding the dynamics of cochlear amplification
    NIH · K99DC016906 · Dec 1, 2018 – Nov 30, 2020 · Role: Principal Investigator

Publications

  • Cochlear Dispersion Shapes Processing of Frequency Sweeps. J Neurosci. 2026 May 06; 46(18).. View in PubMed
  • Assessment of 7-Item Eustachian Tube Dysfunction Questionnaire in a Clinical Population. Laryngoscope. 2026 06; 136(6):2745-2751.. View in PubMed
  • Visualizing motions within the cochlea’s organ of Corti and illuminating cochlear mechanics with optical coherence tomography. Hear Res. 2025 01; 455:109154.. View in PubMed
  • Intracochlear overdrive: Characterizing nonlinear wave amplification in the mouse apex. J Acoust Soc Am. 2023 11 01; 154(5):3414-3428.. View in PubMed
  • Estimating cochlear impulse responses using frequency sweeps. J Acoust Soc Am. 2023 04 01; 153(4):2251.. View in PubMed
  • Overturning the mechanisms of cochlear amplification via area deformations of the organ of Corti. J Acoust Soc Am. 2022 10; 152(4):2227.. View in PubMed
  • The Elusive Cochlear Filter: Wave Origin of Cochlear Cross-Frequency Masking. J Assoc Res Otolaryngol. 2021 12; 22(6):623-640.. View in PubMed
  • Reflection-Source Emissions Evoked with Clicks and Frequency Sweeps: Comparisons Across Levels. J Assoc Res Otolaryngol. 2021 12; 22(6):641-658.. View in PubMed
  • Asymmetry and Microstructure of Temporal-Suppression Patterns in Basilar-Membrane Responses to Clicks: Relation to Tonal Suppression and Traveling-Wave Dispersion. J Assoc Res Otolaryngol. 2020 04; 21(2):151-170.. View in PubMed
  • Effects of Forward- and Emitted-Pressure Calibrations on the Variability of Otoacoustic Emission Measurements Across Repeated Probe Fits. Ear Hear. 2019 Nov.. View in PubMed

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