publications

2014

• Sungbok Lee, Alexandros Potamianos, Shrikanth Narayanan, "Developmental acoustic study of American English diphthongs", The Journal of the Acoustical Society of America, vol. 136, no. 4, pp. 1880-1894, 2014.
• Shrikanth Narayanan, Asterios Toutios, Vikram Ramanarayanan, Adam Lammert, Jangwon Kim, Sungbok Lee, Krishna Nayak, Yoon-Chul Kim, Yinghua Zhu, Louis Goldstein, Dani Byrd, Erik Bresch, Prasanta Ghosh, Athanasios Katsamanis, Michael Proctor, "Real-time magnetic resonance imaging and electromagnetic articulography database for speech production research (TC)", The Journal of the Acoustical Society of America, vol. 136, no. 3, pp. 1307-1311, 2014. (This publication has an associated webpage).
• Vikram Ramanarayanan, Adam Lammert, Louis Goldstein, Shrikanth Narayanan, "Are articulatory settings mechanically advantageous for speech motor control?", PLoS ONE, Public Library of Science, vol. 9, no. 8, pp. e104168, 2014.
• Jangwon Kim, Adam Lammert, Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Co-registration of speech production datasets from electromagnetic articulography and real-time magnetic resonance imaging", Journal of the Acoustical Society of America Express Letters, vol. 135, no. 2, pp. EL115-EL121, 2014.

• Michael Proctor, Yinghua Zhu, Adam Lammert, Asterios Toutios, Bonny Sands, Shrikanth Narayanan, "Articulatory coordination in Nama click consonants", 15th Australasian International Conference on Speech Science and Technology, Christchurch, New Zealand, 2014.
• Jangwon Kim, Donna Erickson, Sungbok Lee, Shrikanth Narayanan, "A study of invariant properties and variation patterns in the converter/distributor model for emotional speech", Interspeech, Singapore, 2014.
• Jangwon Kim, Sungbok Lee, Shrikanth Narayanan, "Estimation of the movement trajectories of non-crucial articulators based on the detection of crucial moments and physiological constraints", Interspeech, Singapore, 2014.
• Abhay Prasad, Prasanta Kumar Ghosh, Shrikanth Narayanan, "Selection of optimal vocal tract regions using real-time magnetic resonance imaging for robust voice activity detection", Interspeech, Singapore, 2014.
• Vikram Ramanarayanan, Louis Goldstein, Shrikanth Narayanan, "Motor control primitives arising from a learned dynamical systems model of speech articulation", Interspeech, Singapore, 2014.
• Andres Benitez, Vikram Ramanarayanan, Louis Goldstein, Shrikanth Narayanan, "A real-time MRI study of articulatory setting in second language speech", Interspeech, Singapore, 2014.
• Naveen Kumar, Shrikanth Narayanan, "Hull detection based on largest empty sector angle with application to analysis of real time MR images", IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Florence, Italy, 2014.
• Sajan Goud Lingala, Yinghua Zhu, Yoon-Chul Kim, Asterios Toutios, Shrikanth S. Narayanan, Krishna S. Nayak, "High spatio-temporal resolution multi-slice real time MRI of speech using golden angle spiral imaging with constrained reconstruction, parallel imaging, and a novel upper airway coil", International Society for Magnetic Resonance in Medicine (ISMRM) 20th Scientific Sessions, Toronto, Canada, pp. 1539, 2014. ISMRM Merit Awards: Magna Cum Laude
• Caitlin Smith, "Complex tongue shaping in lateral liquid production without constriction-based goals", International Seminar on Speech Production (ISSP), Cologne, Germany, 2014.
• Vikram Ramanarayanan, Louis Goldstein, Shrikanth Narayanan, "Speech motor control primitives arising from a dynamical systems model of vocal tract articulation", International Seminar on Speech Production (ISSP), Cologne, Germany, 2014. Best Student Paper (Northern Digital Inc. Excellence Award)
• Benjamin Parrell, Shrikanth S. Narayanan, "Interaction between general prosodic factors and language-specific articulatory patterns underlies divergent outcomes of coronal stop reduction", International Seminar on Speech Production (ISSP), Cologne, Germany, 2014.
• Jangwon Kim, Naveen Kumar, Sungbok Lee, Shrikanth S. Narayanan, "Enhanced airway-tissue boundary segmentation for real-time magnetic resonance imaging data", International Seminar on Speech Production (ISSP), Cologne, Germany, 2014. Best Student Paper (Northern Digital Inc. Excellence Award)
• Jangwon Kim, Asterios Toutios, Yoon-Chul Kim, Yinghua Zhu, Sungbok Lee, Shrikanth S. Narayanan, "USC-EMO-MRI corpus: An emotional speech production database recorded by real-time magnetic resonance imaging", International Seminar on Speech Production (ISSP), Cologne, Germany, 2014.
• Christina Hagedorn, Adam Lammert, Mary Bassily, Yihe Zu, Uttam Sinha, Louis Goldstein, Shrikanth S. Narayanan, "Characterizing post-glossectomy speech using real-time MRI", International Seminar on Speech Production (ISSP), Cologne, Germany, 2014.

• Zisis Iason Skordilis, Vikram Ramanarayanan, Louis Goldstein, Shrikanth S. Narayanan, "Experimental evaluation of the constant tongue volume hypothesis", 168th Meeting of the Acoustical Society of America, Indianapolis, IN, 2014.
• Adam Lammert, Shrikanth S. Narayanan, "Development of a parametric basis for vocal tract area function representation from a large speech production database", 167th Meeting of the Acoustical Society of America, Providence, RI, 2014.
• Reed Blaylock, Adam Lammert, Louis Goldstein, Shrikanth S. Narayanan, "Gestural coordination of the velum in singing can be different from coordination in speech", 167th Meeting of the Acoustical Society of America, Providence, RI, 2014.

2013

• Adam Lammert, Michael I. Proctor, Shrikanth S. Narayanan, "Interspeaker variability in hard palate morphology and vowel production", Journal of Speech, Language, and Hearing Research, vol. 56, pp. S1924-S1933, 2013.
• Yihe Zu, Shrikanth S. Narayanan, Yoon-Chul Kim, Krishna S. Nayak, Christina Bronson-Lowe, Brenda Villegas, Melody Ouyoung, Uttam Sinha, "Evaluation of swallow function post tongue cancer treatment using real-time MRI: A pilot study", JAMA Otolaryngology - Head & Neck Surgery, vol. 139, no. 12, pp. 1312-1319, 2013.
• Vikram Ramanarayanan, Louis Goldstein, Shrikanth S. Narayanan, "Spatio-temporal articulatory movement primitives during speech production -- extraction, interpretation and validation", Journal of the Acoustical Society of America, vol. 134, no. 2, pp. 1378-1394, 2013.
• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "On smoothing articulatory trajectories obtained from Gaussian Mixture Model based acoustic-to-articulatory inversion", Journal of the Acoustical Society of America Express Letters, vol. 134, no. 2, pp. EL258-EL264, 2013.
• Vikram Ramanarayanan, Louis Goldstein, Dani Byrd, Shrikanth S. Narayanan, "An investigation of articulatory setting using real-time magnetic resonance imaging", Journal of the Acoustical Society of America, vol. 134, no. 1, pp. 510-519, 2013.
• Yinghua Zhu, Yoon-Chul Kim, Michael I. Proctor, Shrikanth S. Narayanan, Krishna S. Nayak, "Dynamic 3D visualization of vocal tract shaping during speech", IEEE Transactions on Medical Imaging, vol. 32, no. 5, pp. 838-848, 2013.
• Adam Lammert, Michael I. Proctor, Shrikanth S. Narayanan, "Morphological variation in the adult hard palate and posterior pharyngeal wall", Journal of Speech, Language, and Hearing Research, vol. 56, pp. 521-530, 2013.
• Michael I. Proctor, Erik Bresch, Dani Byrd, Krishna S. Nayak, Shrikanth S. Narayanan, "Paralinguistic mechanisms of production in human 'beatboxing:' a real-time magnetic resonance imaging study", Journal of the Acoustical Society of America, vol. 133, no. 2, pp. 1043-1054, 2013. (This publication has an associated webpage).
• Adam Lammert, Louis Goldstein, Shrikanth S. Narayanan, Khalil Iskarous, "Statistical methods for estimation of direct and differential kinematics of the vocal tract", Speech Communication, vol. 55, pp. 147–161, 2013.

• Vikram Ramanarayanan, Maarten Van Segbroeck, Shrikanth S. Narayanan, "On the nature of data-driven primitive representations of speech articulation", ISCA Workshop on Speech Production in Automatic Speech Recognition (SPASR), Lyon, France, 2013.
• Yoon-Chul Kim, Jangwon Kim, Michael I. Proctor, Asterios Toutios, Krishna S. Nayak, Sungbok Lee, Shrikanth S. Narayanan, "Toward automatic vocal tract area function estimation from accelerated three-dimensional magnetic resonance imaging", ISCA Workshop on Speech Production in Automatic Speech Recognition (SPASR), Lyon, France, 2013.
• Ming Li, Adam Lammert, Jangwon Kim, Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Automatic classification of palatal and pharyngeal wall shape categories from speech acoustics and inverted articulatory signals", ISCA Workshop on Speech Production in Automatic Speech Recognition (SPASR), Lyon, France, 2013.
• Yinghua Zhu, Asterios Toutios, Shrikanth S. Narayanan, Krishna S. Nayak, "Faster 3D vocal tract real-time MRI using constrained reconstruction", Interspeech, Lyon, France, 2013.
• Zhaojun Yang, Vikram Ramanarayanan, Dani Byrd, Shrikanth S. Narayanan, "The effect of word frequency and lexical class on articulatory-acoustic coupling", Interspeech, Lyon, France, 2013.
• Michael I. Proctor, Louis Goldstein, Adam Lammert, Dani Byrd, Asterios Toutios, Shrikanth S. Narayanan, "Velic coordination in french nasals: a realtime magnetic resonance imaging study", Interspeech, Lyon, France, 2013.
• Vikram Ramanarayanan, Adam Lammert, Louis Goldstein, Shrikanth S. Narayanan, "Articulatory settings facilitate mechanically advantageous motor control of vocal tract articulators", Interspeech, Lyon, France, 2013.
• Colin Vaz, Vikram Ramanarayanan, Shrikanth S. Narayanan, "A two-step technique for MRI audio enhancement using dictionary learning and wavelet packet analysis", Interspeech, Lyon, France, 2013. Best Student Paper Award.
• Caitlin Smith, Michael I. Proctor, Khalil Iskarous, Louis Goldstein, Shrikanth S. Narayanan, "Stable articulatory tasks and their variable formation: Tamil retroflex consonants", Interspeech, Lyon, France, 2013.
• Fang-Ying Hsieh, Louis Goldstein, Dani Byrd, Shrikanth S. Narayanan, "Truncation of pharyngeal gesture in English diphthong [aI]", Interspeech, Lyon, France, 2013.
• Adam Lammert, Vikram Ramanarayanan, Michael I. Proctor, Shrikanth S. Narayanan, "Vocal tract cross-distance estimation from real-time MRI using region-of-interest analysis", Interspeech, Lyon, France, 2013.
• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Information theoretic acoustic feature selection for acoustic-to-articulatory inversion", Interspeech, Lyon, France, 2013.
• Asterios Toutios, Shrikanth S. Narayanan, "Articulatory synthesis of French connected speech from EMA Data", Interspeech, Lyon, France, 2013. (This publication has an associated webpage).
• Ming Li, Jangwon Kim, Prasanta Kumar Ghosh, Vikram Ramanarayanan, Shrikanth S. Narayanan, "Speaker verification based on fusion of acoustic and articulatory Information", Interspeech, Lyon, France, 2013.
• Caitlin Smith, Adam Lammert, "Identifying consonantal tasks via measures of tongue shaping: A real-time MRI investigation of the production of vocalized syllabic /l/ in American English", Interspeech, Lyon, France, 2013.
• Rachel Walker, Michael I. Proctor, "Articulatory overlap in English syllables with postvocalic /[ɹ]/", 21st International Congress on Acoustics, Montreal, Canada, 2013.
• Vikram Ramanarayanan, Adam Lammert, Louis Goldstein, Shrikanth Narayanan, "Does articulatory setting provide some mechanical advantage for speech motor action?", 21st International Congress on Acoustics, Montreal, Canada, 2013.
• Fang-Ying Hsieh, Louis Goldstein, Dani Byrd, Shrikanth Narayanan, "Pharyngeal constriction in English diphthong production", 21st International Congress on Acoustics, Montreal, Canada, 2013.
• Caitlin Smith, Michael Proctor, Khalil Iskarous, Louis Goldstein, Shrikanth Narayanan, "On distinguishing articulatory configurations and articulatory tasks: Tamil retroflex consonants", 21st International Congress on Acoustics, Montreal, Canada, 2013.
• Zhaojun Yang, Vikram Ramanarayanan, Dani Byrd, Shrikanth Narayanan, "An examination of the articulatory characteristics of prominence in function and content words using real-time magnetic resonance imaging", 21st International Congress on Acoustics, Montreal, Canada, 2013.
• Sungbok Lee, Alexandros Potamianos, Shrikanth Narayanan, "Developmental aspects of American English diphthong trajectories in the formant space", 21st International Congress on Acoustics, Montreal, Canada, 2013.
• Adam Lammert, Shrikanth Narayanan, "On instantaneous vocal tract length estimation from formant frequencies", 21st International Congress on Acoustics, Montreal, Canada, 2013.
• Li Hsuan Lu, Adam Lammert, Vikram Ramanarayanan, Shrikanth Narayanan, "A comparative cross-linguistic study of vocal tract shaping in sibilant fricatives in English, Serbian and Mandarin using real-time magnetic resonance imaging", 21st International Congress on Acoustics, Montreal, Canada, 2013.
• Jangwon Kim, Adam Lammert, Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Spatial and temporal alignment of multimodal human speech production data: realtime Imaging, flesh point tracking and audio", IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Vancouver, Canada, 2013.

2012

• Yoon-Chul Kim, Michael I. Proctor, Shrikanth S. Narayanan, Krishna Nayak, "Improved imaging of lingual articulation using real-time multislice MRI", Journal of Magnetic Resonance Imaging, vol. 35, no. 4, pp. 943-948, 2012.

• Michael I. Proctor, Rachel Walker, "Articulatory bases of sonority in English liquids", The Sonority Hierarchy (Steve Parker, ed.), De Gruyter Mouton, Berlin, Germany, pp. 289-316, 2012.

• Jangwon Kim, Prasanta Kumar Ghosh, Sungbok Lee, Shrikanth S. Narayanan, "A study of emotional information present in articulatory movements estimated using acoustic-to-articulatory inversion", APSIPA Annual Summit and Conference, Hollywood, CA, 2012.
• Vikram Ramanarayanan, Prasanta Kumar Ghosh, Adam Lammert, Shrikanth S. Narayanan, "Exploiting speech production information for automatic speech and speaker modeling and recognition – possibilities and new opportunities", APSIPA Annual Summit and Conference, Hollywood, CA, 2012.
• Michael I. Proctor, Li Hsuan Lu, Yinghua Zhu, Louis Goldstein, Shrikanth S. Narayanan, "Articulation of Mandarin Sibilants: a multi-plane realtime MRI study", 14th Australasian International Conference on Speech Science and Technology, Sydney, Australia, 2012.
• Christina Hagedorn, Michael I. Proctor, Louis Goldstein, Maria Luisa Gorno Tempini, Shrikanth S. Narayanan, "Characterizing covert articulation in apraxic speech using real-time MRI", Interspeech, Portland, OR, 2012.
• Assaf Israel, Michael I. Proctor, Louis Goldstein, Khalil Iskarous, Shrikanth S. Narayanan, "Emphatic segments and emphasis spread in Lebanese Arabic: a Real-time magnetic resonance imaging study", Interspeech, Portland, OR, 2012.
• Sungbok Lee, Shrikanth S. Narayanan, "Effects of emotion on the lower lip movements at phrase boundaries", Speech Prosody, Shanghai, China, 2012.
• Yinghua Zhu, Yoon-Chul Kim, Michael I. Proctor, Shrikanth S. Narayanan, Krishna S. Nayak, "Towards dynamic 3D MRI of speech", International Society for Magnetic Resonance in Medicine (ISMRM) 20th Scientific Sessions, Melbourne, Australia, pp. 294, 2012. ISMRM Merit Awards: Magna Cum Laude
• Yoon-Chul Kim, Athanasios Katsamanis, Michael I. Proctor, Shrikanth S. Narayanan, Krishna S. Nayak, "Pseudo golden-ratio spiral imaging with gradient acoustic noise cancellation: application to real-time MRI of fluent speech", International Society for Magnetic Resonance in Medicine (ISPMRM) 20th Scientific Sessions, Melbourne, Australia, pp. 4209, 2012.

2011

• Prasanta Kumar Ghosh, Louis Goldstein, Shrikanth S. Narayanan, "Auditory-like filterbank: An optimal speech processor for efficient human speech communication", Springer Proceedings of Indian Academy of Sciences (Sadhana), vol. 36, no. 5, pp. 699-712, 2011.
• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Automatic Speech recognition using articulatory features from subject-independent acoustic-to-articulatory inversion", Journal of the Acoustical Society of America Express Letters, vol. 130, no. 4, pp. EL251-El257, 2011.
• Yoon-Chul Kim, Cecil Hayes, Shrikanth S. Narayanan, Krishna S. Nayak, "A novel 16-channel receive coil array for accelerated upper airway MRI at 3 Tesla", Magnetic Resonance in Medicine, vol. 65, no. 6, pp. 1711-1717, 2011.
• Prasanta Kumar Ghosh, Louis Goldstein, Shrikanth S. Narayanan, "Processing speech signal using auditory-like filterbank provides least uncertainty about articulatory gestures", Journal of the Acoustical Society of America, vol. 129, no. 6, pp. 4014-4022, 2011.
• Yoon-Chul Kim, Shrikanth S. Narayanan, Krishna S. Nayak, "Flexible retrospective selection of temporal resolution in real-time speech MRI using a golden-ratio spiral view order", Magnetic Resonance in Medicine, vol. 65, no. 5, pp. 1365-1371, 2011.
• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Joint source-filter optimization for robust glottal source estimation in the presence of shimmer and jitter", Speech Communication, vol. 53, no. 1, pp. 98-109, 2011.

• Daniel Bone, Michael I. Proctor, Yoon-Chul Kim, Shrikanth S. Narayanan, "The human vocal instrument: Visualizing tongue shaping in speech sound production", ASA Lay Language Papers: 162nd Acoustical Society of America Meeting, San Diego, CA, 2011.
• Christina Hagedorn, Michael I. Proctor, Louis Goldstein, "Automatic analysis of singleton and geminate consonant articulation using real-time magnetic resonance imaging", Interspeech, Florence, Italy, 2011.
• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Analysis of inter-articulator correlation in acoustic-to-articulatory inversion using generalized smoothness criterion", Interspeech, Florence, Italy, 2011.
• Jangwon Kim, Sungbok Lee, Shrikanth S. Narayanan, "An exploratory study of the relations between perceived emotion strength and articulatory kinematics", Interspeech, Florence, Italy, 2011.
• Athanasios Katsamanis, Erik Bresch, Vikram Ramanarayanan, Shrikanth S. Narayanan, "Validating rt-MRI based articulatory representations via articulatory recognition", Interspeech, Florence, Italy, 2011.
• Yoon-Chul Kim, Michael I. Proctor, Shrikanth S. Narayanan, Krishna Nayak, "Visualization of vocal tract shape using interleaved real-time MRI of multiple scan planes.", Interspeech, Florence, Italy, 2011.
• Adam Lammert, Michael I. Proctor, Athanasios Katsamanis, Shrikanth S. Narayanan, "Morphological variation in the adult vocal tract: a modeling study of its potential acoustic impact", Interspeech, Florence, Italy, 2011.
• Shrikanth S. Narayanan, Erik Bresch, Prasanta Kumar Ghosh, Louis Goldstein, Athanasios Katsamanis, Yoon-Chul Kim, Adam Lammert, Michael I. Proctor, Vikram Ramanarayanan, Yinghua Zhu, "A multimodal real-time MRI articulatory corpus for speech research", Interspeech, Florence, Italy, 2011.
• Michael I. Proctor, Adam Lammert, Athanasios Katsamanis, Louis Goldstein, Christina Hagedorn, Shrikanth S. Narayanan, "Direct estimation of articulatory kinematics from real-time magnetic resonance image sequences", Interspeech, Florence, Italy, 2011.
• Vikram Ramanarayanan, Athanasios Katsamanis, Shrikanth S. Narayanan, "Automatic data-driven learning of articulatory primitives from real-time MRI data using convolutive NMF with sparseness constraints", Interspeech, Florence, Italy, 2011.
• Christina Hagedorn, Michael I. Proctor, Louis Goldstein, Shrikanth S. Narayanan, "Automatic analysis of geminate consonant articulation using real-time magnetic resonance imaging", International Seminar on Speech Production (ISSP), Montreal, Canada, 2011.
• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "A subject-independent acoustic-to-articulatory inversion", IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Prague, Czech Republic, 2011.
• Yoon-Chul Kim, Michael I. Proctor, Shrikanth S. Narayanan, Krishna S. Nayak, "Time-interleaved imaging of arbitrary scan planes applied to real-time speech MRI", International Society for Magnetic Resonance in Medicine (ISMRM) 19th Scientific Sessions, Montreal, Canada, pp. 2454, 2011.
• Yinghua Zhu, Yoon-Chul Kim, Michael I. Proctor, Shrikanth S. Narayanan, Krishna S. Nayak, "Dynamic 3D visualization of vocal tract shaping during speech", International Society for Magnetic Resonance in Medicine (ISMRM) 19th Scientific Sessions, Montreal, Canada, pp. 4355, 2011.
• Athanasios Katsamanis, Matthew Black, Panayiotis G. Georgiou, Louis Goldstein, Shrikanth S. Narayanan, "SailAlign: Robust long speech-text alignment", Workshop on New Tools and Methods for Very-Large Scale Phonetics Research, Philadelphia, PA, 2011.

• Jangwon Kim, Sungbok Lee, Shrikanth S. Narayanan, "Detailed study of articulatory kinematics of critical articulators and non‐critical articulators of emotional speech", 162nd Meeting of the Acoustical Society of America, San Diego, California, 2011.
• Daniel Bone, Michael I. Proctor, Yoon-Chul Kim, Shrikanth S. Narayanan, "Semi-automatic modeling of tongue surfaces using volumetric structural MRI", 162nd Meeting of the Acoustical Society of America, San Diego, CA, 2011.
• Adam Lammert, Michael I. Proctor, Shrikanth S. Narayanan, "Morphological variation in the adult vocal tract: A study using rtMRI", International Seminar on Speech Production (ISSP), Montreal, Canada, 2011. Best Student Paper (Northern Digital Inc. Excellence Award)
• Adam Lammert, Michael I. Proctor, Louis Goldstein, Marianne Pouplier, Shrikanth S. Narayanan, "Automatic identification of stable modes and fluctuations in a repetitive task using real‐time MRI", International Seminar on Speech Production (ISSP), Montreal, Canada, 2011.
• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Information theoretic analysis of direct and estimated articulatory features for phonetic discrimination", International Seminar on Speech Production (ISSP), Montreal, Canada, 2011.
• Vikram Ramanarayanan, Adam Lammert, Dani Byrd, Louis Goldstein, Shrikanth S. Narayanan, "Planning and execution in soprano singing and speaking behavior: An acoustic/articulatory study using real‐time MRI", International Seminar on Speech Production (ISSP), Montreal, Canada, 2011.
• Vikram Ramanarayanan, Dani Byrd, Louis Goldstein, Shrikanth S. Narayanan, "An MRI study of articulatory settings of L1 and L2 speakers of American English", International Seminar on Speech Production (ISSP), Montreal, Canada, 2011.

2010

• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "A generalized smoothness criterion for acoustic-to-articulatory inversion", Journal of the Acoustical Society of America, vol. 128, no. 4, pp. 2162-2172, 2010.
• Erik Bresch, Shrikanth S. Narayanan, "Real-time MRI investigation of resonance tuning in soprano singing", Journal of the Acoustical Society of America Express Letters, vol. 128, no. 5, pp. EL335-EL341, 2010.

• Michael I. Proctor, Krishna S. Nayak, Shrikanth S. Narayanan, "Para-linguistic mechanisms of production in human ’beatboxing’: a real-time MRI study", InterSinging, Tokyo, Japan, 2010.
• Yoon Kim, Shrikanth S. Narayanan, Krishna S. Nayak, "Improved real-time MRI of oral-velar coordination using a golden-ratio spiral view order", Interspeech, Makuhari, Japan, 2010.
• Michael I. Proctor, Daniel Bone, Athanasios Katsamanis, Shrikanth S. Narayanan, "Rapid semi-automatic segmentation of real-time magnetic resonance images for parametric vocal tract analysis", Interspeech, Makuhari, Japan, 2010.
• Adam Lammert, Michael I. Proctor, Shrikanth S. Narayanan, "Data-Driven analysis of realtime vocal tract MRI using correlated image regions", Interspeech, Makuhari, Japan, 2010.
• Vikram Ramanarayanan, Dani Byrd, Louis Goldstein, Shrikanth S. Narayanan, "Investigating articulatory setting —pauses, ready position, and rest— using real-time MRI", Interspeech, Makuhari, Japan, 2010.
• Erik Bresch, Athanasios Katsamanis, Louis Goldstein, Shrikanth S. Narayanan, "Statistical multi-stream modeling of real-time MRI articulatory speech data", Interspeech, Makuhari, Japan, 2010.
• Sungbok Lee, Shrikanth S. Narayanan, "Vocal tract contour analysis of emotional speech by the functional data curve representation", Interspeech, Makuhari, Japan, 2010.
• Jangwon Kim, Sungbok Lee, Shrikanth S. Narayanan, "A study of interplay between articulatory movement and prosodic characteristics in emotional speech production", Interspeech, Makuhari, Japan, 2010.
• Adam Lammert, Louis Goldstein, K. Iskarous, "Locally-weighted regression for estimating the forward kinematics of a geometric vocal tract model", Interspeech, Makuhari, Japan, 2010. Best Paper Award (1 of the 20 best, top 3%)
• Vikram Ramanarayanan, Dani Byrd, Louis Goldstein, Shrikanth S. Narayanan, "A joint acoustic-articulatory study of nasal spectral reduction in read versus spontaneous speaking styles", Speech Prosody, Chicago, Illinois, 2010.
• Yoon-Chul Kim, Shrikanth S. Narayanan, Krishna S. Nayak, "Flexible retrospective selection of temporal resolution in real-time speech MRI using a golden-ratio spiral view order", International Society for Magnetic Resonance in Medicine (ISMRM) 18th Scientific Sessions, Stockholm, Sweden, pp. 4967, 2010.
• Jangwon Kim, Sungbok Lee, Shrikanth S. Narayanan, "An exploratory study of manifolds of emotional speech", IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Dallas, TX, 2010.

• Michael I. Proctor, Adam Lammert, Louis Goldstein, Shrikanth S. Narayanan, "Temporal analysis of articulatory speech errors using direct image analysis of real time magnetic resonance imaging", 160th Meeting of the Acoustical Society of America, Cancun, Mexico, 2010.
• Adam Lammert, Erik Bresch, Louis Goldstein, Shrikanth S. Narayanan, "Gestural control in the English past-tense suffix: an articulatory study using real time MRI", LabPhon12, Albuquerque, NM, 2010.

2009

• Vikram Ramanarayanan, Erik Bresch, Dani Byrd, Louis Goldstein, Shrikanth S. Narayanan, "Analysis of pausing behavior in spontaneous speech using real-time magnetic resonance imaging of articulation", Journal of the Acoustical Society of America Express Letters, vol. 126, no. 5, pp. EL160-EL165, 2009.
• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Pitch contour stylization using an optimal piecewise polynomial approximation", IEEE Signal Processing Letters, vol. 16, no. 9, pp. 810-813, 2009.
• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, "Closure duration analysis of incomplete stop consonants due to stop-stop interaction", Journal of the Acoustical Society of America Express Letters, vol. 126, no. 1, pp. EL1-EL7, 2009.
• Yoon-Chul Kim, Shrikanth S. Narayanan, Krishna S. Nayak, "Accelerated 3D upper airway MRI using compressed sensing", Magnetic Resonance in Medicine, vol. 61, no. 6, pp. 1434-1440, 2009.
• Erik Bresch, Shrikanth S. Narayanan, "Region segmentation in the frequency domain applied to upper airway real-time magnetic resonance images", IEEE Transactions on Medical Imaging, vol. 28, no. 3, pp. 323-338, 2009. (This publication has an associated webpage).
• Dani Byrd, Stephen Tobin, Erik Bresch, Shrikanth S. Narayanan, "Timing effects of syllable structure and stress on nasals: A real-time MRI examination", Journal of Phonetics, vol. 37, no. 1, pp. 97-110, 2009.

• Prasanta Kumar Ghosh, Shrikanth S. Narayanan, Pierre Divenyi, Louis Goldstein, Elliot Saltzman, "Estimation of articulatory gesture patterns from speech acoustics", Interspeech, Brighton, UK, 2009.
• Jangwon Kim, Sungbok Lee, Shrikanth S. Narayanan, "A detailed study of word-position effects on emotion expression in speech", Interspeech, Brighton, UK, 2009.
• Emily Nava, Joseph Tepperman, Louis Goldstein, Maria Luisa Zubizarreta, Shrikanth S. Narayanan, "Connecting rhythm and prominence in automatic ESL pronunciation scoring", Interspeech, Brighton, UK, 2009.
• Joseph Tepperman, Louis Goldstein, Sungbok Lee, Shrikanth S. Narayanan, "Automatically rating pronunciation through articulatory phonology", Interspeech, Brighton, UK, 2009.
• Joseph Tepperman, Erik Bresch, Yoon-Chul Kim, Sungbok Lee, Louis Goldstein, Shrikanth S. Narayanan, "An articulatory analysis of phonological transfer using real-time MRI", Interspeech, Brighton, UK, 2009.
• Yoon-Chul Kim, Shrikanth S. Narayanan, Krishna S. Nayak, "Accelerated 3D MRI of vocal tract shaping using compressed sensing and parallel imaging", IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Taipei, Taiwan, 2009.

• Adam Lammert, Erik Bresch, Dani Byrd, Louis Goldstein, Shrikanth S. Narayanan, "An articulatory study of lexicalized and epenthetic schwa using real time magnetic resonance imaging", 157th Meeting of the Acoustical Society of America, Portland, OR, 2009.
• Michael I. Proctor, Louis Goldstein, Dani Byrd, Erik Bresch, Shrikanth S. Narayanan, "Articulatory comparison of Tamil liquids and stops using real-time magnetic resonance imaging.", 157th Meeting of the Acoustical Society of America, Portland, OR, 2009.

2008

• Erik Bresch, Yoon-Chul Kim, Krishna S. Nayak, Dani Byrd, Shrikanth S. Narayanan, "Seeing speech: Capturing vocal tract shaping using real-time magnetic resonance imaging", IEEE Signal Processing Magazine, vol. 25, no. 3, pp. 123-132, 2008.

• Erik Bresch, Daylen Riggs, Louis Goldstein, Dani Byrd, Sungbok Lee, Shrikanth S. Narayanan, "An analysis of vocal tract shaping in English sibilant fricatives using real-time magnetic resonance imaging", Interspeech, Brisbane, Australia, 2008.

2006

• Erik Bresch, Jon Nielsen, Krishna S. Nayak, Shrikanth S. Narayanan, "Synchronized and noise-robust audio recordings during realtime magnetic resonance imaging scans", Journal of the Acoustical Society of America, vol. 120, no. 4, pp. 1791-1794, 2006. (This publication has an associated webpage).

• Erik Bresch, Jason Adams, Arthur Pouzet, Sungbok Lee, Dani Byrd, Shrikanth S. Narayanan, "Semi-automatic processing of real-time MR image sequences for speech production studies", International Seminar on Speech Production (ISSP), Ubatuba, Brazil, 2006.
• Sungbok Lee, Erik Bresch, Shrikanth S. Narayanan, "An exploratory study of emotional speech production using functional data analysis techniques", International Seminar on Speech Production (ISSP), Ubatuba, Brazil, 2006.
• Sungbok Lee, Erik Bresch, Jason Adams, Abe Kazemzadeh, Shrikanth S. Narayanan, "A study of emotional speech articulation using a fast magnetic resonance imaging technique", Interspeech, Pittsburgh, PA, 2006.

2004

• Shrikanth S. Narayanan, Krishna S. Nayak, Sungbok Lee, Abhinav Sethy, Dani Byrd, "An approach to real-time magnetic resonance imaging for speech production", Journal of the Acoustical Society of America, vol. 115, no. 4, pp. 1771-1776, 2004. (This publication has an associated webpage).

2000

• Carol Y. Espy-Wilson, Suzanne E. Boyce, Michel T. T. Jackson, Shrikanth S. Narayanan, Abeer Alwan, "Acoustic modeling of American English /r/", Journal of the Acoustical Society of America, vol. 108, no. 1, pp. 343-356, 2000.
• Shrikanth S. Narayanan, Abeer Alwan, "Noise source models for fricative consonants", IEEE Transactions on Speech and Audio Processing, vol. 8, no. 2, pp. 328-344, 2000.

• Dani Byrd, Abigail Kaun, Shrikanth S. Narayanan, Elliot Saltzman, "Phrasal signatures in articulation", Papers in Laboratory Phonology V. Acquisition and the Lexicon (Michael B. Broe, Janet B. Pierrehumbert, eds.), Cambridge University Press, New York, NY, pp. 70-87, 2000.

1999

• Shrikanth S. Narayanan, Dani Byrd, Abigail Kaun, "Geometry, kinematics, and acoustics of Tamil liquid consonants", Journal of the Acoustical Society of America, vol. 106, no. 4, pp. 1993-2007, 1999.
• Sungbok Lee, Alexandros Potamianos, Shrikanth S. Narayanan, "Acoustics of children’s speech: Developmental changes of temporal and spectral parameters", Journal of the Acoustical Society of America, vol. 105, no. 3, pp. 1455-1468, 1999.

• Abeer Alwan, Shrikanth S. Narayanan, B. Strope, A. Shen, "Speech production and perception models and their applications to synthesis, recognition, and coding", Speech Processing, Recognition, and Artificial Neural Networks (Chollet, DiBenedetto, Esposito, Marinaro, eds.), Springer-Verlag, London, pp. 138-161, 1999.

• Shrikanth S. Narayanan, Abigail Kaun, "Acoustic modeling of Tamil retroflex liquids", International Congress of Phonetic Sciences (ICPhS), San Francisco, CA, 1999.

1997

• Shrikanth S. Narayanan, Abeer Alwan, Katherine Haker, "Toward articulatory-acoustic models for liquid consonants based on MRI and EPG data. Part I: The laterals", Journal of the Acoustical Society of America, vol. 101, no. 2, pp. 1064-1077, 1997.
• Abeer Alwan, Shrikanth S. Narayanan, Katherine Haker, "Toward articulatory-acoustic models for liquid consonants based on MRI and EPG data. Part II: The rhotics", Journal of the Acoustical Society of America, vol. 101, no. 2, pp. 1078-1089, 1997.

• Sungbok Lee, Alexandros Potamianos, Shrikanth S. Narayanan, "Analysis of children's speech: Duration, pitch and formants", Eurospeech, vol. 1, Rhodes, Greece, pp. 473-476, 1997.
• Shrikanth S. Narayanan, Abeer Alwan, Yong Song, "New results in vowel production: MRI, EPG, and acoustic data", Interspeech, vol. 1, Rhodes, Greece, pp. 1007-1010, 1997.
• Carol Y. Espy-Wilson, Shrikanth S. Narayanan, Abeer Alwan, Suzanne E. Boyce, "Acoustic modelling of American English /r/", Interspeech, vol. 1, Rhodes, Greece, pp. 393-396, 1997.

• Dani Byrd, Shrikanth S. Narayanan, Abigail Kaun, Elliot Saltzman, "Phrasal boundaries and articulatory timing", Fifth Conference on Laboratory Phonology, Chicago, IL, 1997.

1996

• Philbert Bangayan, Abeer Alwan, Shrikanth S. Narayanan, "From MRI and acoustic data to articulatory synthesis: A case study of the lateral approximants in American English", Fourth International Conference on Spoken Language Processing (ICSLP), vol. 2, Philadelphia, PA, pp. 793-796, 1996.
• Shrikanth S. Narayanan, Abigail Kaun, Dani Byrd, Peter Ladefoged, Abeer Alwan, "Liquids in Tamil", Fourth International Conference on Spoken Language Processing (ICSLP), vol. 2, Philadelphia, PA, pp. 797-800, 1996.
• Shrikanth S. Narayanan, Abeer Alwan, "Parametric hybrid source models for voiced and voiceless fricative consonants", IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Atlanta, GA, pp. 377-380, 1996.
• Shrikanth S. Narayanan, Abeer Alwan, "Imaging applications in speech production research", Proceedings of the Society of Photographic Instrumentation Engineers (SPIE) Medical Imaging, vol. 2079, Newport Beach, CA, pp. 120-131, 1996.

• Dani Byrd, Abigail Kaun, Shrikanth S. Narayanan, "Prosodic boundary effects in Tamil: An articulatory study", Meeting of the Linguistic Society of America, San Diego, CA, 1996.

1995

• Shrikanth S. Narayanan, Abeer Alwan, "A nonlinear dynamical systems analysis of fricative consonants", Journal of the Acoustical Society of America, vol. 97, no. 4, pp. 2511-2524, 1995.

• Abeer Alwan, Shrikanth S. Narayanan, B. Strope, A. Shen, "Speech production and perception models and their applications to synthesis, recognition, and coding", International Symposium on Signals, Systems, and Electronics (ISSSE), Monterey, CA, pp. 367-372, 1995.
• Shrikanth S. Narayanan, Abeer Alwan, Katherine Haker, "An articulatory study of liquid approximants in American English", International Congress of Phonetic Sciences (ICPhS), vol. 3, Stockholm, Sweden, pp. 576-579, 1995.

1994

• Shrikanth S. Narayanan, Abeer Alwan, Katherine Haker, "An MRI study of fricative consonants", International Conference on Spoken Language Processing (ICSLP), vol. 2, Yokohama, Japan, pp. 627-630, 1994.

1993

• Shrikanth S. Narayanan, Abeer Alwan, "Strange attractors and chaotic dynamics in the production of voiced and voiceless fricatives", Eurospeech, Berlin, Germany, pp. 77-80, 1993.