Vocal Hyperfunction Clinical Research Center

Multiple Principal Investigators: Robert E. Hillman, PhD, CCC-SLP, and Daryush D. Mehta, PhD, Mass General

This project continues to elucidate multiple factors/mechanisms that are assumed to play important roles in causing and maintaining hyperfunctional voice disorders using a combination of data from ambulatory voice monitoring and other important sources: reflux status, personality, vocal reactivity to environmental sound levels, responses to voice therapy and ambulatory biofeedback, assessment of auditory-motor deficits, and model-generated estimates of phonatory physiological parameters that are difficult/impossible to measure clinically. Research during this second grant cycle will focus on the interrelated goals of further improving the detection of VH and identifying clinically meaningful subgroups (phenotypes) within the broad categories of VH. A combination of advanced statistical and machine learning approaches will be applied to our growing comprehensive/multidimensional voice database to optimize the discovery of VH subgroups based on differences in objective measures of daily (ambulatory) vocal behavior and phonatory pathophysiology. The subgroups will be further differentiated by additional measures that reflect deeper insights into pathophysiological mechanisms (e.g., intrinsic laryngeal muscle activation levels, vocal fold collision pressure, etc.) and potential predisposing factors (e.g., personality, reflux, etc.).

Principal Investigator: Cara E. Stepp, PhD, Boston University

This project uses classic model-driven experimental approaches from speech motor control research to test hypotheses concerning the potential role that disordered sensorimotor mechanisms play in VH. Our central hypothesis, supported by our recent findings, is that auditory-motor function is impaired in some individuals with VH: we found impairments in speakers’ auditory acuity to differences in recordings of their own voice fundamental frequency and their adaptive responses to artificial shifts in their own voice fundamental frequency. We propose to further elucidate the etiologic role of disrupted auditory-motor function in VH and to evaluate measures of auditory-motor function that have clinical applicability. This understanding could allow for assessments that are sensitive to each patient, allowing personalized therapy approaches based on underlying mechanisms.

Principal Investigator: Matías Zañartu, PhD, Universidad Técnica Federico Santa María

This project develops and uses physical and numerical modeling (including subject-specific models) to provide unique insights into the underlying biomechanical, aero-acoustic, and auditory-motor control mechanisms that contribute to the pathophysiology of VH, providing direct links between model outputs and real clinical data with direct application to the ambulatory assessment of vocal function. This project seeks to determine the underlying physical and neurophysiological mechanisms associated with VH, with the goal of identifying triggering mechanisms and differentiating cause from reaction in these disorders. In addition, subject-specific model representations will provide access to additional measures and insights from the available data that will help to elucidate the etiology and pathophysiology of VH.

Principal Investigator: Jarrad H. Van Stan, PhD, CCC-SLP, Mass General

VH is the most commonly treated class of voice disorders by speech-language pathologists and voice therapy is the primary curative treatment. Patients and clinicians report that generalizing improved voicing into daily life is the most significant barrier to successful therapy. In this project, we will test if extending biofeedback into the patient’s daily life using ambulatory voice monitoring will significantly improve generalization during therapy and if individual patient factors, like how easily they can modify their voice and engagement during therapy, moderate the effects of the biofeedback.

Principal Investigator: Robert E. Hillman, PhD, CCC-SLP, Mass General

This project uses an innovative combination of ambulatory biosensors, clinical and laboratory studies, and tracking of treatment-related effects to gain new insights into behavioral (daily voice use), environmental (noise levels), emotional (psychological stress/arousal), and physiological (phonatory function) factors related to the etiology and pathophysiology of VH. Researchers will assess the assumed role of emotional stress in eliciting a differential VH response in patients with hyperfunctional voice disorders and normal controls. In a secondary analysis, the team will examine the hypothesized impact of personality and psychological predisposition (trait theory) in modulating the vocal/VH response to emotional stress by having participants complete personality inventories. A major thrust of this project will involve testing hypotheses about the differential impact of VH on the phonatory physiology (biomechanics) associated with phonotraumatic VH (e.g., nodules) and nonphonotraumatic VH (e.g., muscle tension dysphonia). This will also include investigating the potential modulating impact on VH of environmental noise levels (Lombard Effect – increasing vocal SPL) and the presence of nodules (e.g., testing hypotheses related to the need for post-surgical voice therapy to reduce persistent/residual phonotraumatic VH). Special emphasis will be placed on testing biomechanics-based hypotheses related to the role of collision forces in phonotraumatic VH. Use of ambulatory biofeedback as a treatment strategy will also be assessed.

Principal Investigator: Cara E. Stepp, PhD, Boston University

This project uses classic model-driven experimental approaches from speech motor control research to test hypotheses concerning the potential role that disordered sensorimotor mechanisms play in VH. Auditory-motor integration for feedforward and feedback control are examined. These studies include the potential impact that voice therapy might have in reducing such deficits by triggering neuroplastic central nervous system changes. This project will rely on ambulatory measures that are being further refined in Project 1 to assess pre- and post-treatment changes in daily vocal function.

Principal Investigator: Matías Zañartu, PhD, Universidad Técnica Federico Santa María

This project develops and uses physical and numerical modeling (including subject-specific models) to provide unique insights into the underlying biomechanical, aero-acoustic, and muscle activation mechanisms that contribute to the pathophysiology of VH, providing direct links between model outputs and real clinical data with direct application to the ambulatory assessment of vocal function. This important fundamental work closely links/integrates with Projects 1 and 2 by providing unique insights into these mechanisms that cannot be obtained with current approaches and, in the case of Project 1, extending or improving ambulatory assessment of daily vocal function for clinical evaluation and treatment (biofeedback).

1. A. Testart, G. Galindo, C. Castro, M. Zañartu. “A new visual probabilistic assessment of vocal fold vibration”, The 12th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Hong Kong, October 17-21, 2017.
2. J. P. Cortés, M. Zañartu. “Ambulatory classification of patients with muscle tension dysphonia vs. control group”, The 12th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Hong Kong, October 17-21, 2017.
3. R. Manrıquez, S. D Peterson, P. Prado, P. Orio, M. Zañartu, “Laryngeal muscle activation noise for physiologically-based models of phonation”, The 12th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Hong Kong, October 17-21, 2017.
4. R. Manrıquez, S. D Peterson, P. Prado, P. Orio, M. Zañartu, “Modeling Laryngeal Muscle Activation Noise for Low-Order Physiological Based Speech Synthesis”, Proc. Interspeech 2017, pp 1378- 1382, Stockholm, Sweden, August 2017 
5. V. M. Espinoza, M. Zañartu, J. H. Van Stan, D. D. Mehta, and R. E. Hillman “Uncertainty of glottal airflow estimation during continuous speech using impedance-based inverse filtering of the neck-surface acceleration signal”, Fall 2017 meeting of the ASA, Boston, USA, June 25-29, 2017. 
6. Mehta D. D., Van Stan J. H., Masson M. L. V., Maffei M., Hillman R. E. Relating ambulatory voice measures with self-ratings of vocal fatigue in individuals with phonotraumatic vocal hyperfunction. Proceedings of the Acoustical Society of America 2017.
7. Cortés J. P., Zañartu M., Mehta D. D., Van Stan J. H., Hillman R. E. Classification of patients with muscle tension dysphonia and matched-controls using ambulatory voice monitoring. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2017.
8. Capobianco S., Ruggles R., Ortiz A. J., Mehta D. D., Hillman R. E., Van Stan J. H. Automatic classification of speech and singing during ambulatory voice monitoring using a neck-placed accelerometer. Proceedings of La Voce Artistica 2017.
9. J.P. Cortes, V. M. Espinoza, M. Ghassemi, D. Mehta, J. Van Stan, R. Hillman, J. Guttag, M. Zañartu, “Using Aerodynamic Features and Their Uncertainty for the Ambulatory Assessment of Phonotraumatic Vocal Hyperfunction” IEEE International Conference on Biomedical and Health Informatics, March 4-7, 2018 in Las Vegas, NV.
10. Brockmann-Bauser M., Van Stan J. H., Bohlender J. E., Mehta D. D. Acoustic-based cepstral peak prominence and spectral slope improve with increasing vocal intensity in women with and without voice disorders. Proceedings of the 12th Congress of the European Laryngological Society (ELS) 2018; London, England.
11. Brockmann-Bauser M., Van Stan J. H., Bohlender JE, Mehta D. D. Effect of vocal intensity on cepstral peak prominence and spectral slope in women with and without voice disorders. Proceedings of the Voice Foundation Symposium 2018; Philadelphia, PA.
12. Marks K. L. and Mehta D. D. Impact of non-modal phonation on estimates of subglottal pressure from neck-surface acceleration in healthy speakers. Proceedings of the Voice Foundation Symposium 2018; Philadelphia, PA.
13. Van Stan J. H., Capobianco S., Ruggles R. K., Ortiz A. J., Toles L. E., Marks K. L., Hillman R. E., Mehta D. D. Ambulatory voice measures during singing and speech in patients with phonotraumatic vocal fold lesions compared to matched controls. Proceedings of the Voice Foundation Symposium 2018; Philadelphia, PA.
14. Ghasemzadeh H., Naghibolhosseini M., Mehta D. D., Deliyski D. D. Machine-learning approach for automatic detection of calibrated laser light in transnasal flexible high-speed videoendoscopy. Proceedings of the Voice Foundation Symposium 2018; Philadelphia, PA.
15. Deliyski D., Mehta D. D., Zañartu M., Shishkov M., Bouma B., de Alarcón A., Ghasemzadeh H., Hillman R. E. Laser-calibrated system for laryngeal transnasal flexible high-speed videoendoscopy. Proceedings of the Voice Foundation Symposium 2018; Philadelphia, PA.
16. Brockmann-Bauser M., Van Stan J., Bohlender J. E., Mehta D. D. Spectral acoustic measures improve with increasing vocal intensity. Proceedings of the 29thth Congress of Union of the European Phoniatricians (UEP) 2018; Helsinki, Finland.
17. P. Prado, C. Christian, A. Weinstein, L. Zepeda, M. Zañartu, “Cortical activation of healthy volunteers and muscle tension dysphonia (MTD) patients during Lombard Effect: an EEG study”, Joint meeting of the Chilean Societies of Biology, Genetics, Evolution, and Neuroscience, November 20-22, Puerto Varas, Chile, 2018.
18. Hadwin, P. J. and Peterson, S. D., "Bayesian Inference of Tissue Properties from Glottal Area Waveforms Using a 2D Finite Element Model," 176th Meeting of the Acoustical Society of America, Victoria, BC, November 5-9, 2018.
19. M. Diaz, M. Zañartu, C. Stepp, “How to construct your own high-speed flexible video endoscopy system for research and clinical applications”, The Fall Voice Conference 2018, October 25-27, Seattle, Washington, 2018.
20. Park Y., Stepp C. E. “Do people who have breathier voices perceive breathiness differently?,” The Fall Voice Conference, Seattle, WA, October 25 – October 27, 2018. [poster presentation]
21. Heller Murray E. S., Kolin K. R., Harvey Woodnorth G., Stepp C. E. “Relative Fundamental Frequency in Children With and Without Vocal Fold Nodules”, American Speech and Hearing Association (ASHA) Convention, Boston, MA, November 15-17, 2018. [podium presentation]
22. V. Espinoza, D. Mehta, J. VanStan, R. E. Hillman, M. Zañartu, “Accelerometer-based aerodynamic measures for subjects with phonotraumatic hyperfunction: An in-laboratory study”, 11th International Conference on Voice Physiology and Biomechanics, August 1-3, 2018, East Lansing, Michigan.
23. Heller Murray E.S., Lupiani A.A., Kolin K.R., Stepp C.E. “Accuracy of the commercially available Eventide Eclipse to perturb Auditory feedback of fundamental frequency”, 11th International Conference on Voice Physiology and Biomechanics, East Lansing, MI, August 1 – 3, 2018. [poster presentation] 
24. C. Castro, P. Prado, D. Marfull, A. Testart, A. Weinstein, L. Zepeda, V. Espinoza, M. Zañartu, “Lombard effect and muscle tension dysphonia: acoustic, aerodynamic, biomechanical and cortical changes”, 11th International Conference on Voice Physiology and Biomechanics, August 1-3, 2018, East Lansing, Michigan.
25. J.P. Cortés, V. M. Espinoza, M. Ghassemi, D. Mehta, J. Van Stan, R. Hillman, J. Guttag, M. Zañartu, “Aerodynamic Ambulatory Assessment for Phonotraumatic Vocal Hyperfunction”, 11th International Conference on Voice Physiology and Biomechanics, August 1-3, 2018, East Lansing, Michigan.
26. Deng, J., Hadwin, P. J. and Peterson, S. D., “The Influence of High-Speed Videoendoscopy Data Quality on Reduced-Order Model Parameters Estimated Using Bayesian Inference," 11th International Conference on Voice Physiology and Biomechanics, East Lansing, MI, August 1-3, 2018.
27. M. Motie-Shirazi, B. D. Erath. “The effect of a posterior glottal gap on contact pressures in a synthetic self-oscillating vocal fold model,” 11th International Conference on Voice Physiology and Biomechanics, East Lansing, MI July 31-August 3, 2018.
28. Mehta D., Kobler J., Zeitels S., Hillman R. In vivo probe for tracking intraglottal pressure, vocal fold collision, and subglottal pressure during phonation. Proceedings of the 11th International Conference on Voice Physiology and Biomechanics 2018; East Lansing, MI.
29. Mehta D. D., Van Stan J. H., Hillman R. E. Toward objective ambulatory measures of vocal status in patients with vocal hyperfunction. Proceedings of the 11th International Conference on Voice Physiology and Biomechanics 2018; East Lansing, MI.
30. Toles L., Ortiz A. J., Mehta D. D., Hillman R. E., Van Stan J. H. Speech and singing detection in ambulatory voice recordings in patients with phonotraumatic lesions and controls. Proceedings of the Annual Convention of the American Speech-Language-Hearing Association 2018; Boston, MA.
31. Marks K, Lin J. Z., Mehta D. D. Estimating subglottal pressure from anterior neck-surface acceleration in patients with voice disorders. Proceedings of the Annual Convention of the American Speech-Language-Hearing Association 2018; Boston, MA.
32. Hylkema J., McKenna V. S., Stepp C. E. “Voice Onset Time in Individuals with Hyperfunctional Voice Disorders”, American Speech and Hearing Association (ASHA) Convention, Boston, MA, November 15-17, 2018. [poster presentation]
33. Mehta D. D., Whittico T. H., Ortiz A. J., Marks K. L., Toles L. E., Van Stan J. H., Hillman RE. Investigating ambulatory Lombard effects during the daily life of patients with phonotraumatic vocal hyperfunction. Proceedings of the Occupational Voice Symposium 2019; London, UK.
34. Van Stan J. H., Stadelman-Cohn T., Muise J., Krusemark C., Ortiz A. J., Mehta D. D., Burns J. A., Hron T. A., Hillman R. E. Personalized ambulatory biofeedback for patients with vocal hyperfunction. Proceedings of the Occupational Voice Symposium 2019; London, UK.
35. Ghasemzadeh H., Ford D. S., Deliyski D. D., Kobler J. B., Hillman R. E., Mehta D. D. Calibration method for laser-projection transnasal flexible high-speed videoendoscopy. Proceedings of the Voice Foundation Symposium 2019; Philadelphia, PA. Received Sataloff Award.
36. Gabriel A. Alzamendi, Christian Castro Toro, Sean D. Peterson, Byron D. Erath, Matías Zañartu, “Modeling Modal, Breathy, and Pressed Voice Qualities: The Role of Intrinsic Laryngeal Muscle Activation”, 48th Voice Foundation Annual Symposium: Care of the Professional Voice, Philadelphia, Pennsylvania, May 29 - June 2, 2019.
37. Juan Pablo Cortés, Víctor M. Espinoza, Christian Castro Toro, Rodrigo Manríquez Peralta, Alba Testart Tobar, Matías Zañartu, “Classification Performance of Paired Subjects with Vocal Hyperfunction in the Presence of Subglottal Inverse Filtering Uncertainties: Pilot Study under Laboratory Conditions”, 48th Voice Foundation Annual Symposium: Care of the Professional Voice, Philadelphia, Pennsylvania, May 29 - June 2, 2019.
38. Pavel Prado, Álvaro Cavieres, Lucia Zepeda, Alejandro Weinstein, Matías Zañartu, Sonja Kotz, Wael El-Deredy, “Understanding Cortical Activation Associated with Corollary Discharge during Speech Production: The Role of Active and Passive Listening”, 48th Voice Foundation Annual Symposium: Care of the Professional Voice, Philadelphia, Pennsylvania, May 29 - June 2, 2019.
39. Matías Zañartu, “Estimating Vocal Fold Contact Pressure In Vivo from Raw Laryngeal High-Speed Videoendoscopy using a Hertz Contact Model”, invited talk at the special session “Quantifying Vocal Fold Contact Pressure using Direct and Indirect Measurement Modalities”, 48th Voice Foundation Annual Symposium: Care of the Professional Voice, Philadelphia, Pennsylvania, May 29 - June 2, 2019.
40. Sean D. Peterson “Quantifying Vocal Fold Contact Pressure through Bayesian Estimation of Reduced and High-Order Vocal Fold Models”, invited talk at the special session “Quantifying Vocal Fold Contact Pressure using Direct and Indirect Measurement Modalities”, 48th Voice Foundation Annual Symposium: Care of the Professional Voice, Philadelphia, Pennsylvania, May 29 - June 2, 2019.
41. Byron D. Erath “Quantifying Uncertainty in Contact Pressure Measurements with Synthetic, Self-Oscillating Vocal Fold Models”, invited talk at the special session “Quantifying Vocal Fold Contact Pressure using Direct and Indirect Measurement Modalities”, 48th Voice Foundation Annual Symposium: Care of the Professional Voice, Philadelphia, Pennsylvania, May 29 - June 2, 2019.
42. Daryush D. Mehta, “Validating Vocal Fold Contact Pressure Measurement using Excised Human Larynx Models”, invited talk at the special session “Quantifying Vocal Fold Contact Pressure using Direct and Indirect Measurement Modalities”, 48th Voice Foundation Annual Symposium: Care of the Professional Voice, Philadelphia, Pennsylvania, May 29 - June 2, 2019.
43. Deliyski D. D., Ghasemzadeh H., Ford D. S., Mehta D. D., Shishkov M., Bouma B. E., Kobler J. B., Zanartu M., de Alarcon A., Hillman R. E. Laser-projection system and method for 3D calibrated laryngeal measurements using transnasal flexible high-speed videoendoscopy. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2019.
44. Mehta D. D., Kobler J. B., Zañartu M., Erath B. D., Motie-Shirazi M., Peterson S. D., Petrillo R. H., Hillman R. E. Vocal fold collision pressure amplitude and timing in an excised hemilarynx setup with dual high-speed videoendoscopy. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2019.
45. Van Stan J. H., Vangel M., Mehta D. D., Ortiz A. J., Toles L. E., Marks K. L., Hillman R. E. Differences in ambulatory vocal behavior between patients with phonotraumatic lesions and matched healthy controls. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2019.
46. Cortés J. P., Alzamendi G. A., Weinstein A, Yuz J. I., Espinoza V. M., Mehta D. D., Van Stan J. H., Hillman R. E., Zañartu M. Uncertainty of ambulatory airflow estimates and its effect on the classification of phonotraumatic vocal hyperfunction. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2019.
47. MotieShirazi M., Peterson S. D., Zañartu M., Mehta D. D., Kobler J. B., Hillman R. E., Erath B. D. Contact pressure and length as a function of posterior glottal area: Synthetic vocal fold investigations. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2019.
48. Lin J. Z., Espinoza V. M., Zañartu M., Marks K. L., Mehta D. D. Accelerometer-based prediction of subglottal pressure in healthy speakers producing non-modal phonation. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2019.
49. Espinoza V. M., Mehta D. D., Van Stan J..H , Hillman R. E., Zañartu M. Comparing accelerometer and oral airflow based aerodynamic measures in patients with vocal hyperfunction. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2019.
50. Pavel Prado, Christian Castro, Alejandro Weinstein, Lucía Zepeda, Juan Mucarquer and Matías Zañartu,” Cortical Mechanisms Controlling the Speech Production During Lombard Effect: An EEG Study.”, The 13th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Montreal, Quebec, Canada, June 2 - 4, 2019.
51. Jonathan Deng, Paul Hadwin, Mohsen Motie-Shirazi, Byron Erath, Matías Zañartu And Sean Peterson,” Extracting Reduced-Order Model Parameters from High-Speed Video Of Silicone Vocal Folds Using A Gradient-Based Approach”, The 13th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Montreal, Quebec, Canada, June 2 - 4, 2019.
52. Paul Hadwin, Mohsen Motie-Shirazi, Byron Erath, Matías Zañartu And Sean Peterson,” Estimating Patient-Specific Contact Pressures Using A Finite Element Model”, The 13th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Montreal, Quebec, Canada, June 2 - 4, 2019.
53. Gabriel A. Alzamendi, Sean D. Peterson, Byron Erath And Matías Zañartu, “Updated Rules for Constructing A Triangular Body-Cover Model Of The Vocal Folds From Intrinsic Laryngeal Muscle Activation”, The 13th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Montreal, Quebec, Canada, June 2 - 4, 2019.
54. Gabriel Alzamendi, Sean Peterson, Byron Erath And Matías Zañartu, “On the Role Of Simultaneous Observations For A Bayesian Estimation Of Subglottal Pressure And Laryngeal Muscle Activation”, The 13th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Montreal, Quebec, Canada, June 2 - 4, 2019.
55. Heller Murray E. S., Hseu A., Nuss R., Harvey Woodnorth G., Stepp C. E. “Auditory acuity to fundamental frequency in children with and without vocal fold nodules”, The 13th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Montreal, Quebec, June 2 – 4, 2019. [podium presentation]
56. Aaron A, Ortiz AJ, Mehta D, Hillman R, Van Stan J. Ambulatory trends in objective voice measures associated with self-reported vocal status change for patients with vocal hyperfunction and matched controls. Proceedings of The Fall Voice Conference 2019; Dallax, TX. 
57. Marks KL, Toles LE, Mehta DD, Hillman RE. Psychometric analysis of the Singing Voice Handicap Index-10 in singers with vocal hyperfunction and healthy controls. Proceedings of The Fall Voice Conference 2019; Dallax, TX. 
58. Ghasemzadeh H, Deliyski DD, Hillman RE, Mehta DD. Accurate detection of spatially calibrating laser points during transnasal, fiberoptic, laryngeal high-speed videoendoscopy using support vector machine. Proceedings of The Acoustical Society of America 2019; San Diego, CA. 
59. Ghasemzadeh, H., Deliyski, D. D. (2020). Non-Linear Image Distortions in Flexible Fiberoptic Endoscopes and Their Effects on Laser-Calibrated Horizontal Measurements. The Voice Foundation’s 49th. Annual Symposium: Care of the Professional Voice, May 27-May 31. 
60. Ghasemzadeh, H., Deliyski, D. D. (2020). Horizontal Calibration for a Laser-Projection Transnasal Fiberoptic High-Speed Videoendoscopy. The Voice Foundation’s 49th. Annual Symposium: Care of the Professional Voice, May 27-May 31. 
61. Verdi A, Marks KL, Toles LE, Van Stan JH, Ortiz AJ, Hillman RE, Mehta DD. Ecological momentary assessment of vocal effort in patients with vocal hyperfunction. Proceedings of The Fall Voice Conference 2020; Virtual. Best Virtual Podium Presentation Award. 
62. Toles LE, Marks KL, Van Stan JH, Mehta DD, Hillman RE. The role of personality in the presence of phonotrauma in singers. Proceedings of The Fall Voice Conference 2020; Virtual. 
63. Brockmann-Bauser M, Van Stan JH, Sampaio MC, Bohlender JE, Hillman RE, Mehta DD. Effect of vocal intensity and fundamental frequency on cepstral peak prominence in women with and without voice disorders. Proceedings of the 12th International Conference on Voice Physiology and Biomechanics 2020; Grenoble, France (Virtual). 
64. Lin JZ, Espinoza VM, Marks KL, Zañartu M, Mehta DD. Improved subglottal pressure estimation from neck-surface vibration in patients with voice disorders. Proceedings of the 12th International Conference on Voice Physiology and Biomechanics 2020; Grenoble, France (Virtual). 
65. Mohsen Motie-Shirazi, Matias Zañartu, Sean D. Peterson, Byron D. Erath, “Compensation for a Posterior Glottal Opening Leads to Vocal Fold Trauma: Measurements of Contact Force as a Function of Aerodynamic and Kinematic Measures”, SB3C2020, Summer Biomechanics, Bioengineering and Biotransport Conference, June 17-20, 2020, Vail, CO, USA. 
66. Weerathunge H.R., Abur D., Enos N.M., Brown K., Stepp C.E. “Auditory-Motor Perturbations of Voice Fundamental Frequency: Effects of Feedback Delay and Amplification,” Conference on Motor Speech, Santa Barbara, CA, February 20-23, 2020. [poster presentation] 
67. Heller Murray E.S., Stepp C.E. “Vocal Pitch Perception and Production in Children and Adults,” Conference on Motor Speech, Santa Barbara, CA, February 20-23, 2020. [podium presentation] 
68. Kearney E., Smith D.J., Stepp C.E., Guenther F.H. “Contributions of Auditory and Somatosensory Feedback to Vocal Motor Control,” Conference on Motor Speech, Santa Barbara, CA, February 20-23, 2020. [poster presentation] 
69. Toles LE, Roy N, Sogg S, Marks KL, Ortiz AJ, Mehta DD, Hillman RE. Relationships between daily speaking voice use and personality in singers with healthy voices. Proceedings of the 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2021; Bogotà, Colombia (Virtual). 
70. Marks KL, Verdi A, Toles LE, Stipancic KL, Ortiz AJ, Hillman RE, Mehta DD. Psychometric analysis of an ecological vocal effort scale in individuals with and without vocal hyperfunction during activities of daily living. Proceedings of the 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2021; Bogotà, Colombia (Virtual). 
71. Cortés JP, Mehta DD, Ortiz AJ, Toles LE, Marks KL, Van Stan JH, Hillman RE. Relationships between the neck-surface acceleration parameters of the Daily Phonotrauma Index and glottal aerodynamic measures in vocally healthy females. Proceedings of the 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2021; Bogotà, Colombia (Virtual). 
72. Van Stan JH, Ortiz AJ, Burns JA, Marks KL, Toles LE, Mehta DD, Hron T, Stadelman-Cohen T, Krusemark C, Muise J, Fox AB, Nudelman C, Zeitels SM, Hillman RE. Use of the Daily Phonotrauma Index (DPI) to quantify treatment-related changes in the daily voice use of patients with phonotrauma. Proceedings of the 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2021; Bogotà, Colombia (Virtual). 
73. Ghasemzadeh H, Deliyski DD, Hillman RE, Mehta DD. Indirect spatial calibration of the horizontal plane of endoscopic laryngeal images: How to do it and what to look for. Proceedings of the 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2021; Bogotà, Colombia (Virtual). 
74. Ciccarelli GA, Mehta DD, Ortiz AJ, Toles LE, Marks KL, Van Stan JH, Hillman RE, Quatieri TF. Ambulatory monitoring of the Lombard effect during the daily life of patients with hyperfunctional voice disorders. Proceedings of the 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2021; Bogotà, Colombia (Virtual). 
75. G. A. Alzamendi, S. D. Peterson, B. D. Erath, M. Zañartu, “Investigating antagonistic muscle control in non-phonotraumatic vocal hyperfunction using a triangular body-cover model of the vocal folds”, 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, AQL 2021, June 7-10 2021, Online. 
76. R. Manríquez, V. M. Espinoza, C. Castro, J. P. Cortés, and M. Zañartu, Calibration Uncertainty of Impedance-based Inverse Filtering from Neck Surface Acceleration”, 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, AQL 2021, June 7-10 2021, Online. 
77. E. J. Ibarra, J. A. Parra, G. A. Alzamendi, J. P. Cortés, V. M. Espinoza, M. Zañartu, “A Machine Learning Framework for Estimating Subglottal Pressure during Running Speech from Glottal Airflow measures”, 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, AQL 2021, June 7-10 2021, Online. 
78. M. Motie-Shirazi, M. Zañartu, S. D. Peterson, B. D. Erath, “Influence of a posterior glottal opening on dissipated collision power: synthetic self-oscillating vocal fold investigations”, 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, AQL 2021, June 7-10 2021, Online. 
79. J. A. Parra, E. Ibarra, G. A. Alzamendi, J. P. Cortés, M. Zañartu. “Discovering Underlying Physical Parameters From Daily Phonotrauma Index Distributions using Monte Carlo Simulations of a Low-Dimensional Voice Production Model”, 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, AQL 2021, June 7-10 2021, Online. 
80. C. Castro, V. Espinoza, J. Pablo Cortes, P. Prado, M. Zañartu, “Lombard effect retention after noise removal in patients with phonotraumatic and non-phonotraumatic vocal hyperfunction”, 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, AQL 2021, June 7-10 2021, Online. 
81. M. D. Groll, S. D. Peterson, M. Zañartu, J. M. Vojtech, C. E. Stepp “Evaluating the relationship between relative fundamental frequency and the end of vocal fold collision in voicing offset”, 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, AQL 2021, June 7-10 2021, Online. 
82. Javier G. Fontanet, Juan I. Yuz, Matías Zañartu, “Parametric Identification of a Linear Time Invariant Model for a Subglottal System, 19th IFAC Symposium on System Identification, (SYSID 2021), July 13-16 2021, Online. 
83. M. Zañartu, D.D. Mehta, and R. E. Hillman, “Why is the clinical assessment of vocal aerodynamics relevant?”, The 2021 American Society of Thermal and Fluids Engineers (ASTFE) Conference, May 26-28, 2021. 
84. Mehta DD, Kobler JB, Zeitels SM, Petrillo RH, Hillman RE. In vivo measurement of intraglottal, subglottal, and vocal fold collision pressures in a hemilaryngectomy patient. Proceedings of the 14th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2021; Bogotà, Colombia (Virtual). 
85. Emiro J. Ibarra, Jesús A. Parra, Gabriel A. Alzamendi, Juan P. Cortés, Víctor M. Espinoza, Matías Zañartu, “Método para la estimación de la función vocal usando un sensor de aceleración”, 77° Congreso Chileno de Otorrinolaringología 2021, 9-12 Noviembre 2021, online. 
86. J. Parra, M. Zañartu “Descubriendo parámetros físicos subyacentes a partir de las distribuciones ambulatorias diarias de un modelo matemático de voz”, 77° Congreso Chileno de Otorrinolaringología 2021, 9-12 Noviembre 2021, online. 
87. Emiro J. Ibarra, Jesús A. Parra, Gabriel A. Alzamendi, Juan P. Cortés, Víctor M. Espinoza, Matías Zañartu, “Método para la estimación de la función vocal usando un sensor de aceleración”, 77° Congreso Chileno de Otorrinolaringología 2021, 9-12 Noviembre 2021, online. 
88. J. Parra, M. Zañartu “Descubriendo parámetros físicos subyacentes a partir de las distribuciones ambulatorias diarias de un modelo matemático de voz”, 77° Congreso Chileno de Otorrinolaringología 2021, 9-12 Noviembre 2021, online. 
89. Mohsen Motie-Shirazi, Matías Zañartu, Sean Peterson, Byron Erath, “Fluid-structure energy exchange during phonation: investigation of dissipated collision energy by direct measurement of internal tissue velocity”, 74th Annual Meeting of the APS Division of Fluid Dynamics, November 21–23, 2021, Phoenix, Arizona. 
90. Mohsen Motie-Shirazi, Matías Zañartu, Sean Peterson, Byron Erath, “Fluid-structure energy exchange during phonation: investigation of dissipated collision energy by direct measurement of internal tissue velocity”, 74th Annual Meeting of the APS Division of Fluid Dynamics, November 21–23, 2021, Phoenix, Arizona. 
91. Marks KL, Toles LE, Houde L, Verdi A, Groll M, Hillman RE, Mehta DD. In-field relative fundamental frequency via neck-surface vibration in patients with vocal hyperfunction and vocally healthy controls. Proceedings of the Voice Foundation Symposium 2021; Philadelphia, PA (Virtual). 
92. Ghasemzadeh H, Deliyski DD, Hillman RE, Mehta DD, Verdolini Abbott K. Post-surgery changes in vocal fold closing velocity in patients with mass lesions. Proceedings of the Voice Foundation Symposium 2021; Philadelphia, PA (Virtual). 
93. Ghasemzadeh, H., Imani Azad, A., Deliyski, D. D. (2021). External Validity of Calibrated Measurements from a Laser-Projection Transnasal Fiberoptic High-Speed Videoendoscopy System. The Voice Foundation’s 50th. Annual Symposium: Care of the Professional Voice, June 2 – June 6.  
94. Seidman AY, Toles LE, Mehta DD. Clinical utility of vocal efficiency measures for voice disorder assessment. Proceedings of the American Speech-Language Hearing Association Convention 2021; Washington, DC. 
95. Abur D., Subaciute A., Kapsner-Smith M., Segina R.K., Tracy, L.F., Noordzij J.P., Stepp C.E. “Impaired auditory discrimination and sensorimotor integration in hyperfunctional voice disorders”, 14th International Conference on Advances in Quantitative Laryngology, Voice, and Speech Research, Virtual/Bogotá, Colombia, June 7-10, 2021. [podium presentation] 
96. Tomassi N.E., Castro M.E., Timmons Sund L., Diaz-Cadiz M.E., Buckley D.P., Stepp C.E. “Effects of sidetone amplification on vocal function during telecommunication”, 51st Annual Voice Foundation Symposium, Philadelphia, PA, June 1 – June 5, 2022. [podium presentation] 
97. Dahl K.L., Stepp C.E. “Effect of cognitive load on voice acoustics in individuals with hyperfunctional voice disorders,” 51st Annual Voice Foundation Symposium, Philadelphia, PA, June 1 – June 5, 2022. [poster presentation] 
98. Weerathunge H.R.†, Alzamendi G.A., Cler G.J., Guenther F.H., Stepp C.E., Zanartu M. “LaDIVA: A neurocomputational model providing laryngeal motor control for speech acquisition and production,” Conference on Motor Speech, Santa Barbara, CA, February 16, 2022. [podium presentation] 
99. Ghasemzadeh H, Hillman RE, Ortiz AJ, Van Stan J, Mehta DD. Discriminative power of ambulatory phonation and non-phonation behaviors to classify patients with phonotraumatic vocal hyperfunction and vocally healthy matched controls. Proceedings of the Voice Foundation Symposium 2022; Philadelphia, PA. 
100. Kapsner-Smith MR, Díaz-Cádiz ME, Vojtech JM, Buckley DP, Mehta DD, Hillman RE, Tracy LF, Noordzij JP, Eadie TL, Stepp CE. Clinical cutoff scores for acoustic indices of vocal hyperfunction that combine relative fundamental frequency and cepstral peak prominence. Proceedings of the Voice Foundation Symposium 2022; Philadelphia, PA. *Honorable Mention for David W. Brewer Award for Best Poster. 
101. Espinoza, VM, Cortés JP, Zañartu M, Alzamendi GA, Yuz JI, Mehta DD, Hillman RE. Modeling and estimation of neck-surface skin and subglottal systems with an ARMA-based model. Proceedings of the Voice Foundation Symposium 2022; Philadelphia, PA. 
102. Eastman SE, Hillman RE, Ghasemzadeh H, Mehta DD. Quantifying the occupational voice use of teachers. Proceedings of The Fall Voice Conference 2022; San Francisco, CA. 
103. Ghasemzadeh H, Hillman RE, Ortiz AJ, Van Stan JH, Mehta DD. Temporal quantification of voicing-resting patterns using ambulatory voice monitoring of patients with phonotraumatic vocal hyperfunction. Proceedings of the Annual Convention of the American Speech-Language-Hearing Association 2022; New Orleans, LA. 
104. J. P. Cortés, C. Castro, P. Prado, L. Zepeda, V. Espinoza, and M. Zañartu, “Exploring the Lombard effect in participants with non-phonotraumatic vocal hyperfunction using a simplified version of the DIVA model”, 51st Anniversary Symposium: Care of the Professional Voice, June 1 – 5, Philadelphia, PA, 2022. 
105. H. R. Weerathunge, G. A. Alzamendi, G. J. Cler, F. H. Guenther, C. E. Stepp, M. Zañartu “LaDIVA: A neurocomputational model providing laryngeal motor control for speech acquisition and production” Madonna Motor Speech Conference, Feb 17-20, 2022, Charleston, South Carolina. 
106. Ghasemzadeh H, Hillman RE, Ortiz AJ, Van Stan J, Mehta DD. Quantifying ambulatory voicing-resting behaviors reveals subtypes in patients with phonotraumatic vocal hyperfunction. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2023; Phoenix, AZ.  
107. Ghasemzadeh H, Hillman RE, Mehta DD. Giving statistical title back to machine learning: statistical power analysis and statistical model confidence of machine learning. Proceedings of the International Conference on Advances in Quantitative Laryngology, Voice and Speech Research 2023; Phoenix, AZ. *Conference Travel Award. 
108. Mehta DD, Guttag JV, Van Stan JH, Ghassemi M, Gonzalez Ortiz JJ, Ghasemzadeh H, Hillman RE. Enhancing clinical voice assessment with real-world, ambulatory monitoring of patients with voice disorders. Proceedings of the MIT-MGB AI Cures Conference 2023; Cambridge, MA. 
109. Van Stan JH, Burns J, Hron T, Zeitels S, Mehta D, Hillman RE, Ghasemzadeh H. Improved detection of mild phonotrauma in daily life. Proceedings of the Combined Otolaryngology Spring Meetings 2023; Boston, MA. 
110. Toles LE, Bullock PL, Hillman RE, Mehta DD. Acoustic-aerodynamic voice outcome ratios identify changes in vocal function following vocal fold medialization for unilateral vocal fold paralysis. Proceedings of the Annual Voice Foundation Symposium 2023; Philadelphia, PA. 
111. Ghasemzadeh H, Hillman RE, Espinoza VM, Ortiz AJ, Van Stan JH, Mehta DD. Subject-specific calibration of vocal fold dissipated power detects phonotrauma. Proceedings of the Annual Voice Foundation Symposium 2023; Philadelphia, PA. 
112. Ghasemzadeh H, Hillman RE, Ortiz AJ, Van Stan JH, Mehta DD. Phonotraumatic vocal hyperfunction manifests differently based on ambulatory monitoring of speaking versus singing. Proceedings of the Annual Voice Foundation Symposium 2023; Philadelphia, PA. 
113. E. Ibarra, G. A. Alzamendi, M. Zañartu, “Estimating the biomechanics of vocal function from glottal airflow measures using constrained extended Kalman filter and body cover model of the vocal folds”, Proceedings of the Annual Voice Foundation Symposium 2023; Philadelphia, PA. 
114. J. Martinez, M. Zañartu, “Comparative Analysis of Intrinsic Muscle Activation of the Larynx Using the EMG Decomposition Method in Different Phonatory Tasks. A Preliminary Study”, Proceedings of the Annual Voice Foundation Symposium 2023; Philadelphia, PA. 
115. J. Parra, BS, G. Alzamendi, M. Zañartu, “Nodule Approximation in a Triangular Shaped Vocal Fold Model“, Proceedings of the Annual Voice Foundation Symposium 2023; Philadelphia, PA. 
116. Aaron A., Volk K., Abur D., Stepp C.E. “The relationship between pitch discrimination and fundamental frequency variation: effects of singing status and vocal hyperfunction” The Fall Voice Conference, San Francisco, CA, October 6, 2023. [podium presentation] 

Robert Hillman, PhD, CCC-SLP

Director, Vocal Hyperfunction Clinical Research Center
Co-Director and Research Director, Mass General Voice Center
Professor of Surgery, Harvard Medical School
Director of Research Programs, MGH Institute of Health Professions

Sarah DeRosa, MA

Administrator Coordinator for Research and Speech-Language Pathology, Mass General Voice Center

Daryush Mehta, PhD

Principal Investigator, Technology and Data Science Core, Vocal Hyperfunction Clinical Research Center
Director, Voice Science and Technology Laboratory, Mass General Voice Center
Associate Investigator, Mass General
Associate Professor of Surgery, Harvard Medical School
Adjunct Associate Professor, MGH Institute of Health Professions
Director of Student Affairs, Harvard Speech and Hearing Bioscience Technology Program

Dimitar Deliyski, PhD

MSU Foundation Professor and Department Chair, Michigan State University

Jennifer Fellman

MS Student, Speech-Language Pathology, MGH Institute of Health Professions

Laura Fishman

MS Student, Speech-Language Pathology, MGH Institute of Health Professions

Annie B. Fox, PhD

Associate Professor, MGH Institute of Health Professions

Hamzeh Ghasemzadeh, PhD

Postdoctoral Research Fellow, Mass General Voice Center
Research Fellow in Surgery, Harvard Medical School

Anatoly Goldstein, PhD

Computer Systems Coordinator, Mass General Voice Center

John Guttag, PhD

Dugald C. Jackson Professor of Computer Science and Electrical Engineering, Massachusetts Institute of Technology

Ben Kevelson

Research Engineer, Mass General Voice Center

Katherine Matton, MSE

PhD Student, Electrical Engineering and Computer Science, MIT

Andrew J. Ortiz, MS

Research Engineer, Mass General Voice Center

Rob Petit

Software Developer, Consultant

Samara Smith

MS Student, Speech-Language Pathology, MGH Institute of Health Professions 

David Viggiano

Software Developer, Consultant

Zilan Zhu

MS Student, Speech-Language Pathology, MGH Institute of Health Professions

Robert Hillman, PhD, CCC-SLP

Director, Vocal Hyperfunction Clinical Research Center; Principal Investigator, Project 1
Co-Director and Research Director, Mass General Voice Center
Professor of Surgery, Harvard Medical School
Director of Research Programs, MGH Institute of Health Professions

Daryush Mehta, PhD

Principal Investigator, Project 1, Vocal Hyperfunction Clinical Research Center
Director, Voice Science and Technology Laboratory, Mass General Voice Center
Associate Investigator, Mass General
Associate Professor of Surgery, Harvard Medical School
Adjunct Associate Professor, MGH Institute of Health Professions
Director of Student Affairs, Harvard Speech and Hearing Bioscience Technology Program  

Jarrad Van Stan, PhD, CCC-SLP

Research Speech-Language Pathologist, Mass General Voice Center
Assistant Professor in Surgery, Harvard Medical School
Adjunct Assistant Professor, MGH Institute of Health Professions

Steven Zeitels, MD, FACS

Director of the Mass General Voice Center
Eugene B. Casey Professor of Laryngeal Surgery, Harvard Medical School

Ahsan Cheema, MS

PhD Student, Speech and Hearing Bioscience and Technology, Harvard University

Grace Chow, BS

Clinical Research Coordinator, Boston Medical Center

Jameson Cooper, MS, CCC-SLP

Research Speech-Language Pathologist, Mass General Voice Center

Anna Frazier, BS 

PhD Student, Speech and Hearing Bioscience and Technology, Harvard University

Hamzeh Ghasemzadeh, PhD

Postdoctoral Research Fellow, Mass General Voice Center
Research Fellow in Surgery, Harvard Medical School

Amy Gottlieb, MS-CF-SLP

Speech-Language Pathologist, Boston Medical Center

James Heaton, PhD

Associate Investigator, Mass General Voice Center
Associate Professor of Surgery, Harvard Medical School
Adjunct Professor, MGH Institute of Health Professions 

Tiffiny A. Hron, MD

Laryngeal Surgeon, Mass General Voice Center

Nelson Roy, PhD

Professor of Communication Science and Disorder, University of Utah

Lauren Tracy, MD

Laryngeal Surgeon, Boston Medical Center
Assistant Professor of Otolaryngology, Chobanian and Avedisian School of Medicine, Boston University

Emma Willis, MS

Research Speech-Language Pathologist, Mass General Voice Center
PhD Student, Speech-Language Pathology, MGH Institute of Health Professions

Jeremy Wolfberg, MS, CCC-SLP 

Research Speech-Language Pathologist, Mass General Voice Center
PhD Student, Speech-Language Pathology, MGH Institute of Health Professions

Zilan Zhu 

MS Student, Speech-Language Pathology, MGH Institute of Health Professions 

Cara Stepp, PhD

Principal Investigator, Project 2, Vocal Hyperfunction Clinical Research Center at Mass General
Director, Sensorimotor Rehabilitation Engineering Lab, Boston University
Professor, Departments of Speech, Language & Hearing Sciences, Otolaryngology-Head & Neck Surgery, and Biomedical Engineering, Boston University

Allison Aaron, MS, CCC-SLP

Doctoral student, Sensorimotor Rehabilitation Engineering Lab,
Department of Speech, Language, and Hearing Sciences, Boston University

Daniel Buckley, MS, CCC-SLP

Faculty Lecturer, Department of Speech, Language & Hearing Sciences, Boston University 

Megan Cushman, BS

Research Coordinator and Lab Manager, STEPP Lab for Sensorimotor Rehabilitation Engineering, Speech, Language & Hearing Sciences, Boston University

Kimberly Dahl, MS, CCC-SLP

Doctoral Student, Sensorimotor Rehabilitation Engineering Lab, Department of Speech, Language, and Hearing Sciences, Boston University

Manuel Díaz Cádiz, MS

Research Fellow, Sensorimotor Rehabilitation Engineering Lab, Department of Speech, Language, and Hearing Sciences, Boston University

Daria Dragicevic, BA

Doctoral Student, Sensorimotor Rehabilitation Engineering Lab, Department of Speech, Language, and Hearing Sciences, Boston University

Turley Duque

Doctoral Student, Sensorimotor Rehabilitation Engineering Lab, Department of Speech, Language, and Hearing Sciences, Boston University

Alex Estrada, BS

Research Fellow, STEPP Lab for Sensorimotor Rehabilitation Engineering, Speech, Language & Hearing Sciences, Boston University

Taylor Feaster, BA

Research Fellow, STEPP Lab for Sensorimotor Rehabilitation Engineering, Speech, Language & Hearing Sciences, Boston University

Saul Frankford, PhD

Postdoctoral Fellow, STEPP Lab for Sensorimotor Rehabilitation Engineering, Speech, Language & Hearing Sciences, Boston University  

Nichole Houle, PhD, CCC-SLP

Postdoctoral Fellow, STEPP Lab for Sensorimotor Rehabilitation Engineering, Speech, Language & Hearing Sciences, Boston University

Mara Kapsner-Smith, MS, CCC-SLP

PhD Student, Department of Speech and Hearing Sciences, University of Washington

Katherine Marks, PhD, CCC-SLP

Postdoctoral Research Fellow, Sensorimotor Rehabilitation Engineering Lab, Department of Speech, Language, and Hearing Sciences, Boston University

J. Pieter Noordzij, MD

Professor, Otolaryngology-Head & Neck Surgery, Boston University School of Medicine

Joseph Perkell, PhD, DDS

Senior Research Scientist, Department of Speech, Language & Hearing Sciences, Sargent College, Boston University

Nicole Tomassi, BS

PhD Student, Stepp Lab for Sensorimotor Rehabilitation Engineering, Graduate Program for Neuroscience, Boston University

Bridget Walsh, PhD, CCC-SLP

Associate Professor, Communicative Sciences and Disorders, Michigan State University

Hasini Weerathunge, BS

PhD Student, Stepp Lab for Sensorimotor Rehabilitation Engineering, Department of Biomedical Engineering, Boston University

Matías Zañartu, PhD

Principal Investigator, Project 3, Vocal Hyperfunction Clinical Research Center at Mass General
Associate Professor, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Byron Erath, PhD

Associate Professor, Department of Mechanical and Aeronautical Engineering, Clarkson University

Sean Peterson, PhD

Frank Guenther, PhD

Professor, Department of Speech, Language & Hearing Sciences, Boston University

Professor, Department of Biomedical Engineering, Boston University

Preeti Sivasankar, PhD, CCC-SLP

Professor and Department Head, Department of Speech, Language, and Hearing Sciences
Adjunct Faculty, Indiana University School of Medicine-West Lafayette

Gabriel Alzamendi, PhD

Assistant Research/Instructor Professor, Institute for Research and Development on Bioengineering and Bioinformatics, Universidad Nacional de Entre Ríos

Ali Bizhanpour

MS Student, Department of Mechanical and Aeronautical Engineering, Clarkson University

Carlos Calvache

PhD Student, Faculty of Basic and Applied Sciences, Universidad Militar Nueva Granada

Juan Pablo Cortés, PhD

Post-Doctoral Research Associate, Advanced Center for Electrical and Electronic Engineering, Universidad Técnica Federico Santa María

Jhosmary Cuadros, MS

PhD Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Jonathan Deng, MS, PhD

Post-Doctoral Research Associate, Department of Mechanical and Mechatronics Engineering, University of Waterloo

Nicholas Hewko

PhD Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Emiro Ibarra, MS

PhD Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Josué Martinez, MS

PhD Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Rocío Ortega

MS Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Jesus Parra, MS

PhD Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Nicolás Quinteros

PhD Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Trystan Semmens

MS Student, Department of Mechanical and Mechatronics Engineering, University of Waterloo

Lucia Zepeda

Research Fellow, Advanced Center for Electrical and Electronic Engineering, Universidad Técnica Federico Santa María

Jarrad Van Stan, MS, CCC-SLP

Principal Investigator, Project 4, Vocal Hyperfunction Clinical Research Center
Research Speech-Language Pathologist, Mass General Voice Center
Assistant Professor in Surgery, Harvard Medical School
Adjunct Assistant Professor, MGH Institute of Health Professions

Robert Hillman, PhD, CCC-SLP

Co-Director and Research Director, Mass General Voice Center
Professor of Surgery, Harvard Medical School
Director of Research Programs, MGH Institute of Health Professions

Grace Chow, BS

Clinical Research Coordinator, Boston Medical Center

Jameson Cooper, MS, CCC-SLP

Research Speech-Language Pathologist, Mass General Voice Center

Amanda Gillespie, PhD, CCC-SLP

Director of Speech Pathology and Co-Director, Emory Voice Center
Assistant Professor of Otolaryngology, Emory University School of Medicine

Amy Gottlieb, MS-CF-SLP

Speech-Language Pathologist, Boston Medical Center

Dagmar Sternad, PhD

Professor of Biology, Electrical and Computer Engineering, and Physics, Northeastern University

Lauren Tracy, MD

Laryngeal Surgeon, Boston Medical Center
Assistant Professor of Otolaryngology, Chobanian and Avedisian School of Medicine, Boston University

Emma Willis, MS

Research Speech-Language Pathologist, Mass General Voice Center
PhD Student, Speech-Language Pathology, MGH Institute of Health Professions

Jeremy Wolfberg, MS, CCC-SLP 

Research Speech-Language Pathologist, Mass General Voice Center
PhD Student, Speech-Language Pathology, MGH Institute of Health Professions

Defne Abur, BS

Assistant Professor, University of Groningen

Lindsay Baron

Former MS Student, Speech-Language Pathology, MGH Institute of Health Professions

James Burns, MD

Former Associate Visiting Surgeon, Mass General Voice Center

Tamara Carrera

Undergraduate Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Christian Castro, SLP

Research Fellow, Advanced Center for Electrical and Electronic Engineering, Universidad Técnica Federico Santa María

Harold Cheyne II, PhD

Manager of Audio Systems Research, Bose Corporation

Gregory Ciccarelli, PhD

Amazon.com, Inc.

Joseph Deauna

SLP Clinical Fellow, Spaulding Outpatient Center Cambridge

Anton Dolling, BA

Content Strategist, Ally

Sarah Eastman, MS

Singing Voice Specialist and Speech-Language Pathology Clinical Fellow, the Voice Rehab, Sunrise (Miami), FL

Víctor Espinoza, PhD

Research Fellow, Department of Sound, Universidad de Chile

Gabriel Galindo, PhD

Formerly with the Department of Electronic Engineering, Universidad Técnica Federico Santa María

Kayla Gautereaux

Associate Professor, Boston Conservatory at Berklee

Elizabeth Heller Murray, PhD, CCC-SLP

Assistant Professor, Department of Communication Sciences and Disorders, Temple University

Javier González, MS

PhD Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Jose Javier Gonzalez Ortiz

PhD Student, Electrical Engineering and Computer Science, Massachusetts Institute of Technology

Paul J. Hadwin, PhD

Post-Doctoral Research Associate, Department of Mechanical and Mechatronics Engineering, University of Waterloo

Liane Houde, MS

Chuanbing Huo, MS

Former MS Student, Speech-Language Pathology, MGH Institute of Health Professions

Samantha Kridgen, MS

Speech-Language Pathology Clinical Fellow, University of Alabama at Birmingham

Rodrigo Manriquez, MS

Research Fellow, Advanced Center for Electrical and Electronic Engineering, Universidad Técnica Federico Santa María

Mohsen Motie-Shirazi, MS

Former PhD Student, Department of Mechanical and Aeronautical Engineering, Clarkson University

Juan Mucarquer, MS

Formerly with the Department of Electronic Engineering, Universidad Técnica Federico Santa María

Charlie Nudelman, MS

Voice Pathologist Clinical Fellow, Lakeshore Professional Voice Center, St. Clair Shores, MI

Benjamin Opazo, BS 

MS Student, Department of Electronic Engineering, Universidad Técnica Federico Santa María

Yeonggwang Park, PhD

Postdoctoral Fellow, Department of Communication Science and Disorders, University of South Florida

Pavel Prado, PhD

Post-Doctoral Research Associate, Advanced Center for Electrical and Electronic Engineering, Universidad Técnica Federico Santa María

Thomas Quatieri, PhD

Senior Staff, Human Health and Performance Systems Group, MIT Lincoln Laboratory

Javier Romero, MS

Formerly with the Department of Electronic Engineering, Universidad Técnica Federico Santa María

Roxanne Segina, BA

Former MS Student, Stepp Lab for Sensorimotor Rehabilitation Engineering, Department of Speech, Language, & Hearing Sciences, Boston University

Ariana Seidman, MS

Speech Language Pathology Clinical Fellow, Ochsner LSU Health Shreveport

Mohamed Serry, MS

PhD Student, Department of Mechanical and Mechatronics Engineering, University of Waterloo

Joseph Stemple, PhD

Professor of Rehabilitation Science and Otolaryngology, University of Kentucky

Co-Director, Laryngeal and Speech Dynamics Laboratory, University of Kentucky

Austeja Subaciute, BS

Laura Toles, PhD, CCC-SLP

Assistant Professor, Department of Otolaryngology-Head and Neck Surgery,
University of Texas Southwestern Medical Center

Mark Vangel, PhD

Statistician, Mass General Hospital
Assistant Professor in Radiology, Harvard Medical School
Biostatistician, General Clinical Research Center, Massachusetts Institute of Technology

Alessandra Verdi, MS

Clinical Fellow, Emory Healthcare, Atlanta, GA

Thomas Whittico, MS

Former MS student, Speech-Language Pathology, MGH Institute of Health Professions

Brianna Williams, MS, CCC-SLP

Speech-Language Pathologist, Northside Hospital, Atlanta, GA

Oliver Saunders Wilder, PhD

Post-Doctoral Fellow, Media Lab and Simons Center for the Social Brain, Massachusetts Institute of Technology

Juan Yuz, PhD

Professor, Department of Electronic Engineering, Universidad Técnica Federico Santa María