Research Interests

Decoding speech using neuronal oscillations; Hierarchical neuronal oscillators and the basis for cortical computation; Analysis of MEG signals recorded while performing a speech perception task; Predicting consonant confusions in noise; Closed‐loop auditory models for robust automatic speech recognition; Modeling damaged cochleae using speech‐governed methodologies.

Current Research

Dr. Ghitza’s current research focuses on the formulation of cortical computation principles that underlie the speech decoding process and that are capable of predicting human performance in speech perception tasks.

Selected Recent Publications

Ghitza, O. “Linking speech perception and neurophysiology: speech decoding guided by cascaded oscillators locked to the input rhythm” Front. Psychology. 2: 130. (2011) doi: 10.3389/fpsyg.2011.00130

Ghitza, O. and Greenberg, S. “On the possible role of brain rhythms in speech perception: Intelligibility of time compressed speech with periodic and aperiodic insertions of silence” Phonetica. 66: 113–126. (2009) doi:10.1159/000208934

Shamir, M., Ghitza, O., Epstein, S. and Kopell, N. “Representation of time-varying stimuli by a network exhibiting oscillations on a faster time scale” PLoS Comput Biol. 5 (5). (2009) doi:10.1371/journal.pcbi.1000370

Messing, D. P., Delhorne, L., Bruckert, E., Braida, L. D. and Ghitza, O. “A nonlinear efferent‐inspired model of the auditory system; matching human confusions in stationary noise” Speech Communication. 51: 668‐683. (2009) doi:10.1016/j.specom.2009.02.002

Rix, A. W., Beerends, J. G., Kim, D.‐S., Kroon, P. and Ghitza, O. “Objective Assessment of Speech and Audio Quality – Technology and Applications” IEEE Trans. Audio, Speech and Language Proc. SAP‐14 (6), 1890‐1901. (2006)

Ghitza, O. “On the upper cutoff frequency of the auditory critical‐band envelope detectors in the context of speech perception” J. Acoust. Soc. Am. 110 (3), 1628‐1640. (2001)

Ghitza, O. and Sondhi, M. M. “On the perceptual distance between speech segments” J. Acoust. Soc. Am. 101 (1), 522‐529. (1997)

Ghitza, O. “Auditory models and human performance in tasks related to speech coding and speech recognition” IEEE Trans. on Speech and Audio, SAP‐2 (1). Special issue on Neural networks for Speech Processing, 115‐132. (1994)