V. M. Espinoza, D. D. Mehta, J. H. Van Stan, R. E. Hillman, and M. Zañartu, “Uncertainty of glottal airflow estimation during continuous speech using impedance-based inverse filtering of the neck-surface acceleration signal,” Proceedings of the Acoustical Society of America. 2017.
D. Mehta, J. B. Kobler, G. Maguluri, J. Park, E. Chang, and N. Iftimia, “Integrating optical coherence tomography with laryngeal videostroboscopy,” Proceedings of the Acoustical Society of America. 2017.Abstract

Special Session: New trends in imaging for speech production (Speech Communication Technical Committee)

During clinical voice assessment, laryngologists and speech-language pathologists rely heavily on laryngeal endoscopy with videostroboscopy to evaluate pathology and dysfunction of the vocal folds. The cost effectiveness, ease of use, and synchronized audio and visual feedback provided by videostroboscopic assessment serve to maintain its predominant clinical role in laryngeal imaging. However, significant drawbacks include only two-dimensional spatial imaging and the lack of subsurface morphological information. A novel endoscope will be presented that integrates optical coherence tomography that is spatially and temporally co-registered with laryngeal videoendoscopic technology through a common path probe. Optical coherence tomography is a non-contact, micron-resolution imaging technology that acts as a visual ultrasound that employs a scanning laser to measure reflectance properties at air-tissue and tissue-tissue boundaries. Results obtained from excised larynx experiments demonstrate enhanced visualization of three-dimensional vocal fold tissue kinematics and subsurface morphological changes during phonation. Real-time, calibrated three-dimensional imaging of the mucosal wave and subsurface layered microstructure of vocal fold tissue is expected to benefit in-office evaluation of benign and malignant tissue lesions. Future work calls for the in vivo evaluation of the technology in patients before and after surgical management of these types of lesions.

D. D. Mehta, J. H. Van Stan, M. L. V. Masson, M. Maffei, and R. E. Hillman, “Relating ambulatory voice measures with self-ratings of vocal fatigue in individuals with phonotraumatic vocal hyperfunction,” Proceedings of the Acoustical Society of America. 2017.
poster
V. McKenna, A. Llico, D. Mehta, and C. Stepp, “Neck-surface acceleration as an estimate of subglottal pressure during modulated vocal effort in healthy speakers,” Proceedings of the Annual Convention of the American Speech-Language-Hearing Association. 2016.
C. E. Stepp, M. Zañartu, D. D. Mehta, and R. E. Hillman, “Hyperfunctional voice disorders: Current results, clinical implications, and future directions of a multidisciplinary research program,” Proceedings of the Annual Convention of the American Speech-Language-Hearing Association, 2016.
M. Maffei, J. H. Van Stan, R. E. Hillman, and D. D. Mehta, “Correlating ambulatory voice measures with vocal fatigue self-ratings in individuals with MTD and normal controls,” Proceedings of the Annual Convention of the American Speech-Language-Hearing Association, 2016.
Poster
R. E. Hillman, D. Mehta, C. Stepp, J. Van Stan, and M. Zanartu, “Objective assessment of vocal hyperfunction,” Proceedings of The Journal of the Acoustical Society of America, vol. 139, pp. 2193-2194, 2016.
O. Murton, et al., “Impact of congestive heart failure on voice and speech production: A pilot study,” Proceedings of the Annual Scientific Meeting of the Heart Failure Society of America, 2016.
Poster
M. Brockmann-Bauser, J. E. Bohlender, and D. D. Mehta, “Acoustic perturbation measures improve with increasing vocal intensity in healthy and pathological voices,” Proceedings of the Voice Foundation Symposium, 2016.
H. Aljehani, J. H. Van Stan, C. W. Haynes, and D. D. Mehta, “Ambulatory voice monitoring of a Muslim imam during Ramadan,” Proceedings of the Voice Foundation Symposium, 2015.
Poster
A. S. Fryd, J. H. Van Stan, R. E. Hillman, and D. D. Mehta, “Estimating subglottal pressure during phonation with a neck-surface accelerometer sensor,” Proceedings of the Annual Convention of the American Speech-Language-Hearing Association, 2015.
Poster
M. L. Cooke, D. D. Mehta, and R. E. Hillman, “Relationships between the Cepstral-Spectral Index of Dysphonia and vocal fold vibratory function during phonation,” Proceedings of the 43rd Annual Symposium of the Voice Foundation: Care of the Professional Voice, 2014.
Poster
R. E. Hillman, D. Mehta, J. H. Van Stan, M. Zañartu, M. Ghassemi, and J. V. Guttag, “Subglottal ambulatory monitoring of vocal function to improve voice disorder assessment,” The Journal of the Acoustical Society of America, vol. 136, pp. 2260-2260, 2014.
D. D. Mehta, J. H. Van Stan, and R. E. Hillman, “Deriving acoustic voice quality measures from subglottal neck-surface acceleration,” Proceedings of the International Conference on Voice Physiology and Biomechanics, 2014.
Poster
M. Ghassemi, et al., “Detecting voice modes for vocal hyperfunction prevention,” Proceedings of the 7th Annual Workshop for Women in Machine Learning. 2012.
D. D. Mehta, S. M. Zeitels, J. A. Burns, A. D. Friedman, D. D. Deliyski, and R. E. Hillman, “High-speed videoendoscopic analysis of relationships between cepstral-based acoustic measures and voice production mechanisms in patients undergoing phonomicrosurgery,” Proceedings of the American Laryngological Association. 2011.
D. D. Mehta, M. Zañartu, T. F. Quatieri, D. D. Deliyski, and R. E. Hillman, “Use of laryngeal high-speed videoendoscopy systems to study voice production mechanisms in human subjects,” Proceedings of the Acoustical Society of America, vol. 130, pp. 2439-2439, 2011.
S. S. Karajanagi, et al., “Assessment of canine vocal fold function after injection of a new biomaterial designed to treat phonatory mucosal scarring,” Proceedings of the American Broncho-Esophagological Association. 2010.
D. D. Mehta, M. Zañartu, T. F. Quatieri, D. D. Deliyski, and R. E. Hillman, “Acoustic correlates of human vocal fold vibratory phase asymmetry through modeling and laryngeal high-speed videoendoscopy,” Proceedings of the International Conference on Advances in Quantitative Laryngology, 2010.
S. M. Lulich, M. Zañartu, D. D. Mehta, and R. E. Hillman, “Source-filter interaction in the opposite direction: Subglottal coupling and the influence of vocal fold mechanics on vowel spectra during the closed phase,” Proceedings of the Acoustical Society of America. 2009.

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