biology banner

CLFS_logo


A - Z

titleboxJONATHAN SIMON titlebox

professor pictureAssistant Professor

email:jzsimon@eng.umd.edu
phone:
301.405.6812 (office)
301.405.9534 (lab)
fax:301.314.9358
office:3227 Bio-Psych
graduate programs: Biology, C-CEBH, NACS
bullet visit lab page   bullet most recent publications


RESEARCH INTERESTS

My broad research goal is to understand how the auditory cortex processes complex sounds such as speech and other natural sounds. Because of my focus on speech and higher order processing, my research uses human rather than animal subjects. To non-invasively record and analyze real-time neural processing in humans, I use magnetoencephalography (MEG), because of its high temporal resolution (milliseconds) and reasonable spatial resolution (millimeters).

Human auditory responses to speech: Using independent component analysis, the primary neural generators of responses to speech can be isolated and localized (this has never before been done for humans). But how are the response patterns determined by the speech stimuli?

Human auditory responses to speechlike modulations: What are the temporal response properties of human auditory cortex to sounds modulated at rates bandwidths prevalent in speech (< 20 Hz and > 1 octave)? What are the temporal response properties of human auditory cortex to sounds co-modulated in both amplitude and frequency (AM/FM), as is common in speech and natural sounds?

Connection between Human data and animal data: What are the properties of the neural networks within auditory cortex that allow the large scale processing of sounds? What are the single neuron and network correlates of measurements made in humans, and vice versa?

Auditory scene analysis: Why and how are identical sounds encoded differently depending on whether the sound is perceived as a foreground vs. background sound. Binaural processing in humans: How are sounds that are intrinsically binaural processed differently than those that are essentially monaural, even when the sounds are perceptually similar? What is the neural correlate of the detection of a binaural auditory object, and how is it different from the neural correlate of the disappearance of a binaural auditory object?

Recent Publications


Chait, M., D. Poeppel, and J. Z. Simon (2007) Human Auditory Cortical Processing Of Transitions Between 'Order' And 'Disorder', in Hearing - From Sensory Processing to Perception, Kollmeier, B., Klump, G., Hohmann, V., Langemann, U., Mauermann, M., Uppenkamp, S., and Verhey, J. (Eds.), (Springer Verlag: New York) 323-331.
 
de Cheveigné, A., and J. Z. Simon (2007) Denoising Based on Time-Shift PCA, J Neurosci Methods 165(2), 297-305.
 
Chait, M., D. Poeppel and J. Z. Simon (2007) Stimulus Context Affects Auditory Cortical Responses to Changes in Interaural Correlation, J. Neurophysiology, 98, 224-231.
 
de Cheveigné, A., J. Le Roux and J.Z. Simon (2007) MEG Signal Denoising Based On Time-Shift PCA, In Proc. ICASSP 2007 International Conference on Acoustics, Speech, and Signal Processing, Vol. I, 317-320.
 
Chait, M., G. Eden, D. Poeppel, J. Z. Simon, D. F. Hill and D. L. Flowers (2007) Delayed Detection of Tonal Targets in Background Noise in Dyslexia, Brain and Language, 102, 80-90.
 
Chait, M., D. Poeppel, A. de Cheveigné and J. Z. Simon (2007), Processing Asymmetry of Transitions between Order and Disorder in Human Auditory Cortex, J Neurosci, 27, 5207-5214.
 
Simon, J. Z., D.A. Depireux, D. J. Klein, J.B. Fritz and S.A. Shamma (2007), Temporal Symmetry in Primary Auditory Cortex: Implications for Cortical Connectivity, Neural Computation, 19, 583-638.
 
Luo, H., Y. Wang, D. Poeppel and J. Z. Simon (2006), Concurrent Encoding of Frequency and Amplitude Modulation in Human Auditory Cortex: MEG Evidence, J. Neurophysiology, 96, 2712-2723.
 
Klein, D.J., J.Z. Simon, D.A. Depireux, and S.A. Shamma (2006), Stimulus-Invariant Processing and Spectrotemporal Reverse Correlation in Primary Auditory Cortex, J. Comput. Neurosci, 20(2), 111-136.
 
Chait, M., D. Poeppel and J. Z. Simon (2006), Neural Response Correlates of Detection of Monaurally and Binaurally-Created Pitches in Humans, Cerebral Cortex, 16(6), 835-848.
 
Chait, M. and J. Z. Simon (2006) The Dynamics of the Construction of Auditory Perceptual Representations: MEG Brain Imaging in Humans, In Reasoning and Cognition Interdisciplinary Series on Reasoning Studies Vol. 2, ed. D. Andler, Y. Ogawa, M. Okada, and S. Watanabe, 265-280.
 
Simon, J. Z. and Y. Wang (2005), Fully Complex Magnetoencephalography, J Neurosci Methods 149(1), 64-73.
 
Chait, M., D. Poeppel, A. de Cheveigné and J. Z. Simon (2005), Human Auditory Cortical Processing of Changes in Interaural Correlation, J. Neurosci 35(37), 8518-8527.
 
Ahmar, N., Y. Wang and J.Z. Simon (2005) Significance Tests for MEG Response Detection, Neural Engineering, 2005. Conference Proceedings. 2nd International IEEE EMBS Conference on, 21-24.
 
Ahmar, N. and J.Z. Simon (2005), MEG Adaptive Noise Suppression using Fast LMS, Neural Engineering, 2005. Conference Proceedings. 2nd International IEEE EMBS Conference on, 29-32.
 
Wang Y., N. Ahmar, J. Xiang, L. Ma, D. Poeppel and J.Z. Simon (2005), Complex Valued Equivalent-Current Dipole Fits for MEG Responses, Neural Engineering, 2005. Conference Proceedings. 2nd International IEEE EMBS Conference on, 273-276.
 
Xiang, J., Y. Wang and J.Z. Simon (2005), MEG Responses to Speech and Stimuli with Speechlike Modulations, Neural Engineering, 2005. Conference Proceedings. 2nd International IEEE EMBS Conference on, 33-36.
 
Elhilali M., Klein D., Fritz J., Simon J. and Shamma S. (2005), The Enigma of Cortical Responses: Slow Yet Precise, in Auditory signal processing: physiology, psychoacoustics, and models, Pressnitzer D., de Cheveigné A., McAdams S. and Collet L., (Springer Verlag: New York), 485-494.
 
Carr, C. E., S. Iyer, D. Soares, S. Kalluri and J. Z. Simon (2005), Are Neurons Adapted for Specific Computations? Examples from Temporal Coding in the Auditory System, In 23 Problems in Systems Neuroscience, ed. L. v. Hemmen and T. Sejnowski. Oxford, 245-265 .