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Lombard Effect in Individuals with Nonphonotraumatic Vocal Hyperfunction: Impact on Acoustic, Aerodynamic, and Vocal Fold Vibratory Parameters
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Castro, Christian; Prado, Pavel; Espinoza, Víctor M.; Testart, Alba; Marfull, Daphne; Manriquez, Rodrigo; Stepp, Cara E.; Mehta, Daryush D.; Hillman, Robert E.; Zañartu, Matías – Journal of Speech, Language, and Hearing Research, 2022
Purpose: This exploratory study aims to investigate variations in voice production in the presence of background noise (Lombard effect) in individuals with nonphonotraumatic vocal hyperfunction (NPVH) and individuals with typical voices using acoustic, aerodynamic, and vocal fold vibratory measures of phonatory function. Method: Nineteen…
Descriptors: Acoustics, Voice Disorders, Motor Reactions, Speech
Clinical Utility of the Ratio of Sound Pressure Level to Subglottal Pressure in Patients Surgically Treated for Phonotraumatic Vocal Fold Lesions
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Toles, Laura E.; Seidman, Ariana Y.; Hillman, Robert E.; Mehta, Daryush D. – Journal of Speech, Language, and Hearing Research, 2022
Purpose: This study aimed to determine whether a simplified, and potentially more stable, acoustic-aerodynamic voice outcome ratio (ratio of sound pressure level [SPL] to subglottal pressure) is comparable to a traditional vocal efficiency measure (ratio of acoustic power to the product of average subglottal pressure and average phonatory airflow)…
Descriptors: Voice Disorders, Surgery, Trauma, Human Body
Clinical Cutoff Scores for Acoustic Indices of Vocal Hyperfunction That Combine Relative Fundamental Frequency and Cepstral Peak Prominence
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Kapsner-Smith, Mara R.; Díaz-Cádiz, Manuel E.; Vojtech, Jennifer M.; Buckley, Daniel P.; Mehta, Daryush D.; Hillman, Robert E.; Tracy, Lauren F.; Noordzij, J. Pieter; Eadie, Tanya L.; Stepp, Cara E. – Journal of Speech, Language, and Hearing Research, 2022
Purpose: This study examined the discriminative ability of acoustic indices of vocal hyperfunction combining smoothed cepstral peak prominence (CPPS) and relative fundamental frequency (RFF). Method: Demographic, CPPS, and RFF parameters were entered into logistic regression models trained on two 1:1 case-control groups: individuals with and…
Descriptors: Voice Disorders, Acoustics, Clinical Diagnosis, Cutting Scores
Estimation of Subglottal Pressure from Neck Surface Vibration in Patients with Voice Disorders
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Marks, Katherine L.; Lin, Jonathan Z.; Burns, James A.; Hron, Tiffiny A.; Hillman, Robert E.; Mehta, Daryush D. – Journal of Speech, Language, and Hearing Research, 2020
Purpose: Given the established linear relationship between neck surface vibration magnitude and mean subglottal pressure (Ps) in vocally healthy speakers, the purpose of this study was to better understand the impact of the presence of a voice disorder on this baseline relationship. Method: Data were obtained from participants with voice disorders…
Descriptors: Voice Disorders, Patients, Human Body, Motion
Collision Pressure and Dissipated Power Dose in a Self-Oscillating Silicone Vocal Fold Model with a Posterior Glottal Opening
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Motie-Shirazi, Mohsen; Zañartu, Matías; Peterson, Sean D.; Mehta, Daryush D.; Hillman, Robert E.; Erath, Byron D. – Journal of Speech, Language, and Hearing Research, 2022
Purpose: The goal of this study was to experimentally evaluate how compensating for the adverse acoustic effects of a posterior glottal opening (PGO) by increasing subglottal pressure and changing supraglottal compression, as have been associated with vocal hyperfunction, influences the risk of vocal fold (VF) trauma. Method: A self-oscillating…
Descriptors: Acoustics, Voice Disorders, Audio Equipment, Human Body
Relative Fundamental Frequency Distinguishes between Phonotraumatic and Non-Phonotraumatic Vocal Hyperfunction
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Murray, Elizabeth S. Heller; Lien, Yu-An S.; Van Stan, Jarrad H.; Mehta, Daryush D.; Hillman, Robert E.; Noordzij, J. Pieter; Stepp, Cara E. – Journal of Speech, Language, and Hearing Research, 2017
Purpose: The purpose of this article is to examine the ability of an acoustic measure, relative fundamental frequency (RFF), to distinguish between two subtypes of vocal hyperfunction (VH): phonotraumatic (PVH) and non-phonotraumatic (NPVH). Method: RFF values were compared among control individuals with typical voices (N = 49), individuals with…
Descriptors: Comparative Analysis, Acoustics, Voice Disorders, Phonemes