Journal Publications
- Kapsner-Smith, M.R., Gill, A., Muzila, A., Polyakova, T., Rubeski, A., Kline, J., Stepp, C.E., Vojtech, J. "Validation of a Python-Based Graphical User Interface for Calculation of Relative Fundamental Frequency." Journal of Voice, In Press. PDF
- Buckley, D.P., Stepp, C.E., & Vojtech, J. "Normative Thresholds for Acoustic Estimates of Relative Fundamental Frequency." Journal of Voice, In Press. PDF
- Raiff, L., Turashvili, D., Heaton, J.T., De Luca, G., Kline, J.C., & Vojtech, J. "Prosodic Preferences of Surface Electromyography-based Subvocal Speech for People With Laryngectomy." Journal of Voice, S0892-1997(24)00373-4, In Press. PDF
- Vojtech, J., Toles, L.E., Buckley, D.P., & Stepp, C.E. "Capturing the intraspeaker heterogeneity of vocal hyperfunction using spatiotemporal indices of relative fundamental frequency." Journal of Speech, Language, and Hearing Research, 68(1), 1–16, 2025. PDF
- Madoule, M.D., Marks, K.L., Nagle, K.F., Kirchgessner, E., Gill, A., Kline, J.C., Vojtech, J.M., & Stepp, C.E. "Qualitative Analysis of Speech-Language Pathologists' Voice Evaluation Practices and Perspectives." American Journal of Speech-Language Pathology, 1–16, 2025. PDF
- Weerathunge, H.R., Vojtech, J., Dunsmuir, C.J., Cocroft, S.J., Díaz-Cádiz, M.E., McKenna, V., & Stepp, C.E. "Characterization of Vocal Motor Control Using Laryngeal Kinematics in Individuals with Hyperfunctional Voice Disorder." Journal of Speech, Language, and Hearing Research, 1–15, 2025. PDF
- Groll, M.D., Peterson, S.D., Zañartu, M., Vojtech, J.M., & Stepp, C.E. "Empirical Evaluation of the Role of Vocal Fold Collision on Relative Fundamental Frequency in Voicing Offset." Journal of Voice, 39(2), 345–352, 2025. PDF
- Vogel, A.P., Spencer, C., Burke, K. de Bruyn, D., Gibilisco, P., Blackman, S., Vojtech, J.M., & Kathiresan, T. "Optimizing Communication in Ataxia: A Multifaceted Approach to Alternative and Augmentative Communication (AAC)." Cerebellum, 1–10, 2024. PDF
- Al-Mfarej, D., Vojtech, J.M., Roy, S.H., Townsend, E., Keysor, J.J., Kuntz, N., Rao, V., Kline, J.C., & Shiwani, B. "A Virtual Reality Exergame: Clinician-Guided Breathing and Relaxation for Children with Muscular Dystrophy." Proceedings – 2023 IEEE Conference on Virtual Reality and 3D User Interfaces, 270–276, 2024. PDF
- Buckley, D.P., Vojtech, J.M., & Stepp, C.E. "Relative fundamental frequency in individuals with globus syndrome and muscle tension dysphagia." Journal of Voice, 38(3), 612–8, 2024. PDF
- Vojtech, J.M. & Stepp, C.E. "Effects of Age and Parkinson's disease on the Relationship between Vocal Fold Abductory Kinematics and Relative Fundamental Frequency." Journal of Voice, 38(5), 1008–22, 2024.
- Vojtech, J.M., Mitchell, C.L., Raiff, L., Kline, J.C., & De Luca, G. "Prediction of Voice Fundamental Frequency and Intensity from Surface Electromyographic Signals of the Face and Neck." Vibration, 5(4), 692–710, 2023. PDF
- McKenna, V.S., Vojtech, J.M., Previtera, M., Kendall, C.L., & Carraro, K.E. "A Scoping Literature Review of Relative Fundamental Frequency (RFF) in Individuals with and without Voice Disorders." Applied Sciences, 12, 8121, 2022. PDF
- Mitchell, C.L., Cler, G.J., Fager, S.K., Contessa, P., Roy, S.H., De Luca, G., Kline, J.C., & Vojtech, J.M. "Ability-Based Methods for Personalized Keyboard Generation." Multimodal Technologies and Interaction, 6, 67, 2022. PDF
- Mitchell, C.M., Cler, G.J., Fager, S.K., Contessa, P., Roy, S.H., De Luca, G., Kline, J.C., & Vojtech, J.M. "Ability-based Keyboards for Augmentative and Alternative Communication." CHI Conference on Human Factors in Computing Systems Extended Abstracts, Article 412, 1–7, 2022. PDF
- Kapsner-Smith, M.R., Díaz Cádiz, M.E., Vojtech, J.M., Buckley, D.P., Mehta, D.D., Hillman, R.E., Tracy, L.F., Noordzij, J.P., Eadie, T.L., & Stepp, C.E. "Clinical Cutoff Scores for Acoustic Indices of Vocal Hyperfunction that Combine Relative Fundamental Frequency and Cepstral Peak Prominence." Journal of Speech, Language, and Hearing Research, 65(4), 1349–69, 2022. PDF
- Groll, M.D., Vojtech, J.M., Hablani, S., Mehta, D.D., Buckley, D.P., Noordzij, J.P., & Stepp, C.E. "Automated relative fundamental frequency algorithms for use with neck-surface accelerometer signals." Journal of Voice, 36(2), 156–169, 2022. PDF
- Vojtech, J.M., Cilento, D.D., Luong, A.T., Noordzij, Jr., J.P., Diaz-Cadiz, M.C., Groll, M.D., Buckley, D.P., McKenna, V.S., Noordzij, J.P., & Stepp, C.E. "Acoustic identification of the voicing boundary during intervocalic offsets and onsets based on vocal fold vibratory measures." Applied Sciences, 11(9), 3816, 2021.
- Vojtech, J.M., Chan, M.D., Shiwani, B., Roy, S.H., Heaton, J.T., Meltzner, G.S., Contessa, P., De Luca, G., Patel, R., & Kline, J.C. "Surface EMG-based recognition, synthesis and perception of prosodic subvocal speech." Journal of Speech, Language, and Hearing Research, 64(6S), 2134–53, 2021. PDF
- Park, Y., Wang, F., Diaz-Cadiz, M., Vojtech, J.M., Groll, M.D., & Stepp, C.E. "Vocal fold kinematics and relative fundamental frequency as a function of obstruent type and speaker age." The Journal of the Acoustical Society of America, 149(4), 2189–99, 2021.
- Groll, M.D., Hablani, S., Vojtech, J.M., & Stepp, C.E. "Cursor click modality in an accelerometer-based computer access device." IEEE Transactions on Neural Systems and Rehabilitation Engineering, 28(7), 1566–72, 2020. PDF
- Vojtech, J.M., Hablani, S., Cler, G.J., & Stepp, C.E. "Integrated head-tilt and electromyographic cursor control." IEEE Transactions on Neural Systems and Rehabilitation Engineering, 28(6), 1442–51, 2019. PDF
- Vojtech, J.M., Segina, R.K., Buckley, D.P., Kolin, K.R., Tardif, M.C., Noordzij, J.P., & Stepp, C.E. "Refining algorithmic estimation of relative fundamental frequency: Accounting for sample characteristics and fundamental frequency estimation method." The Journal of the Acoustical Society of America, 146(5), 3184, 2019. PDF
- Cler, G.J., Kolin, K.R., Noordzij Jr., J.P., Vojtech, J.M., & Stepp, C.E. "Optimized and predictive phonemic interfaces for augmentative and alternative communication." Journal of Speech, Language, and Hearing Research, 62(7), 2065–81, 2019. PDF
- Diaz-Cadiz, M., McKenna, V.S., Vojtech, J.M., & Stepp, C.E. "Adductory vocal fold kinematic trajectories during conventional speed versus high-speed videoendoscopy." Journal of Speech, Language, and Hearing Research, 62(6), 1687–1706, 2019. PDF
- Vojtech, J.M., Noordzij Jr., J.P., Cler, G.J., & Stepp, C.E. "The effects of modulating fundamental frequency and speech rate on the intelligibility, communication efficiency, and perceived naturalness of synthetic speech." American Journal of Speech-Language Pathology, 28(2S), 875–86, 2019. PDF
- Vojtech, J.M., Cler, G.J., & Stepp, C.E. "Prediction of optimal facial electromyographic sensor configurations for human-machine interface control." IEEE Transactions on Neural Systems and Rehabilitation Engineering, 26(8), 1566–76, 2018. PDF
- Vojtech, J.M., Cano-Mejia, J., Dumont, M.F., Sze, R.W., & Fernandes, R. "Biofunctionalized Prussian Blue Nanoparticles for Multimodal Molecular Imaging Applications." Journal of Visualized Experiments, (98), e52621, 2015. Link
Featured Conference Presentations
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Gill, A., Raiff, L., Kirchgessner, E., Stepp, C.E., Kline, J.C., & Vojtech, J.M. "Validation of an automated relative fundamental frequency analysis for clinical voice evaluation." 15th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Phoenix, AZ, March 30–April 1, 2023.
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Mitchell, C.M., Cler, G.J., Fager, S.K., Contessa, P., Roy, S.H., De Luca, G., Kline, J.C., & Vojtech, J.M. "Ability-based Keyboards for Augmentative and Alternative Communication." CHI Conference on Human Factors in Computing Systems Extended Abstracts, ACM, Article 412, 2022.
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Vojtech, J.M., Hablani, S., Cler, G.J., & Stepp, C.E. "Integrated head-tilt & surface electromyographic cursor control for augmentative and alternative communication." Conference on Motor Speech, Santa Barbara, CA, February 19–23, 2020.
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Vojtech, J.M., Noordzij Jr., J.P., Cler, G.J., & Stepp, C.E. "Effects of prosody on the intelligibility, communication efficiency, and perceived naturalness of synthetic speech in augmentative and alternative communication." Conference on Motor Speech, Savannah, GA, February 22–25, 2018.
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Vojtech, J.M., Cler, G.J., Fager, S., & Stepp, C.E. "Predicting optimal surface electromyographic control of communication devices in individuals with motor speech disorders." Conference on Motor Speech, Savannah, GA, February 22–25, 2018.
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Vojtech, J.M., Cler, G.J., Noordzij, Jr., J.P., & Stepp, C.E. "Evaluation of facial electromyographic sensor configuration for optimizing human-machine interface control." Boston Speech Motor Control Mini Symposium, Boston University, March 31, 2017.