CVT PAPERS FROM CVI:
CVT-Voice Therapy used as treatment in 12 patients with Muscle-Tension Dysphonia
McGlashan, J., Aaen, M., White, A., Saccente-Kennedy, B., Tempesta, M., & Sadolin, C. (2025).
Feasibility and Acceptability of Complete Vocal Technique-Voice Therapy (CVT-VT) as a treatment for Primary Muscle Tension Dysphonia (pMTD): A Feasibility Trial.
Journal of Voice, https://www.jvoice.org/article/S0892-1997(25)00308-X/fulltext
Showing how CVT Vocal Modes using metal and density go across and beyond traditional registers
Aaen, M., & Fric, M. (2025).
Going beyond the register – Vocal Mode Categorisation Across Four Octaves in Professional Male and Female Singing Voice Using Voice Range Profile, EGG, Acoustic, and Vibroacoustic Measurements: double case study.
Journal of Voice: https://www.jvoice.org/article/S0892-1997(25)00222-X/abstract
Demonstrating a new methodology for assessing formants in voice using CVT vocal modes
Aaen, M., Mihaljevic, I., Johnson, A., Howell, I., & Chen, C. J. (2025).
A Pitch-Synchronous Study of Formants.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(25)00222-X/abstract
Showing how CVT vocal effects are useful in clinical practice for diagnosing and treating patients
Aaen, M., Sadolin, C., & McGlashan, J. (2025).
An integrative supraglottic sound source taxonomy (SST) for pathological speaking voice: a case series. Journal of Speech, Language, and Hearing Research. https://doi.org/10.1044/2025_JSLHR-24-00475
A new taxonomy of effects
Aaen, M., McGlashan, J., & Sadolin, C. (2024)
Supraglottic Vibration Phenotypes and Taxonomy in Pathological Speaking and Healthy Singing Voice – towards a Unified Physiological, Acoustic, and Functional Terminology. Perspectives of the ASHA special group.
About density
Aaen, M., Christoph, N., McGlashan, J., & Sadolin, C. (2024)
Correlating Degree of Thyroid Tilt Independent of fo Control as a Mechanism for Phonatory Density with EGG and Acoustic Measures across Loudness Conditions. Folia Phoniatrica et Logopaedic.
Journal of Voice: https://doi.org/10.1159/000542842
Aaen, M., & Sadolin, C. (2024).
Towards Improved Auditory-Perceptual Assessment of Timbres: Comparing Accuracy and Reliability of Four Deconstructed Timbre Assessment Models.
Journal of Voice: https://doi.org/10.1016/j.jvoice.2024.03.039
Sol, J., Aaen, M., Sadolin, C., Bosch, L.T. (In Press, Corrected Proof).
Towards automated vocal mode classification in healthy singing voice – an XGBoost decision tree-based machine learning classifier. .
Journal of Voice: https://www.jvoice.org/article/S0892-1997(23)00281-3/abstract
Aaen, M., Thomson, A., Christop, N., Sadolin, C., & McGlashan, J. (2023).
Complete Vocal Technique-Voice Therapy as a Novel Intervention for Rehabilitation of Laryngeal-Phonatory Dysfunction in Acquired Brain-Injury Patients – an Exploratory Retrospective Study.
Perspectives of the ASHA special group. https://pubs.asha.org/doi/10.1044/2023_PERSP-23-00003
McGlashan, J., Aaen, M., White, A., & Sadolin, C. (2023).
Complete Vocal Technique Voice Therapy for Muscle Tension Dysphonia (CVT4MTD).
ClinicalTrials.gov. https://clinicaltrials.gov/study/NCT05365126
Aaen, M., Sadolin, C., White, A., & McGlashan, J. (In Press, Corrected Proof, epub June 3, 2022).
Extreme Vocals – a Retrospective Longitudinal study of Vocal Health in 20 Professional Singers Performing and Teaching Rough Vocal Effects.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(22)00134-5/abstract
Aaen M., McGlashan J., Christoph, N., Sadolin C. (In Press, Corrected Proof, epub Dec 29, 2021).
Deconstructing Timbre into 5 Physiological Parameters: Vocal Mode, Amount of Metal, Degree of Density, Size of Larynx, and Sound Coloring.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(21)00386-6/abstract
Aaen, M., McGlashan, Christoph, N., Sadolin, C. (In Press, Corrected Proof, epub Dec 29, 2021).
Extreme Vocal Effects Distortion, Growl, Grunt, Rattle, and Creaking as measured by Electroglottography and Acoustics in 32 healthy professional singers.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(21)00391-X/abstract
Aaen, M., McGlashan, J., Thu, K., Sadolin, C. (2019).
Assessing and quantifying Air Added to the Voice by means of Laryngo-stroboscopic Imaging, EGG, and Acoustics in Vocally Trained Subjects.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(19)30180-8/abstract
Aaen, M., McGlashan, J., Sadolin, C. (2019).
Investigating Laryngeal “Tilt” on Same-pitch Phonation – Preliminary Findings of Vocal Mode, Metal and Density Parameters as Alternatives to Cricothyroid-Thyroarytenoid “Mix”.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(18)30040-7/abstract
Aaen, M., McGlashan, J., Sadolin C. (2017).
Curbing – The Metallic Mode In-between – An empirical study qualifying and categorizing restrained sounds known as Curbing based on audio perception, laryngostroboscopic imaging, acoustics, LTAS, and EGG. Journal of Voice. https://www.jvoice.org/article/S0892-1997(16)30414-3/abstract
Aaen, M., McGlashan, J., Sadolin, C. (2017).
Laryngostroboscopic exploration of rough vocal effects in singing and their statistical recognisability – An anatomical and physiological description and visual recognisability study of Distortion, Growl, Rattle, and Grunt using laryngostroboscopic imaging and panel assessment.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(17)30489-7/abstract
McGlashan, J. Aaen, M., Sadolin, C. (2017).
Overdrive and Edge as refiners of ‘Belting’?: An empirical study qualifying and categorising ‘belting’ based on audio perception, laryngostroboscopic imaging, Acoustics, LTAS, and EGG.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(16)30218-1/abstract
CVT CONFERENCE PAPERS & PROCEEDINGS FROM CVI:
Brixen, E. B. & Sadolin, C. (2014).
The importance of onset features in listeners’ perception of vocal modes in singing.
Paper presented at the 137th Convention of the Audio Engineering Society, Los Angeles, USA. https://cvtresearch.com/the-importance-of-onset-features-in-listeners-perception-of-vocal-modes-in-singing/
Brixen, E. B. & Sadolin, C. (2013).
Acoustical characteristics of vocal modes in singing.
Paper presented at the 134th Convention of the Audio Engineering Society, Rome, Italy. http://www.aes.org/e-lib/browse.cfm?elib=16797
McGlashan, J., Sayles, M. & Sadolin, C. (2013).
Vocal Effects in Singing: A Study of Intentional Distortion Using Laryngostroboscopy and Electrolaryngography.
Paper presented at the 10th International Conference on Advances in Quantitative Laryngology, Voice and Speech Research, Cincinnati, Ohio, USA. https://cvtresearch.com/papers-2/aql-vocal-effects-in-singing-2013/
Brixen, E. B. & Sadolin, C. (2012).
On Acoustic Detection of Vocal Modes.
Paper presented at the 132nd Convention of the Audio Engineering Society, Budapest, Hungary. https://cvtresearch.com/papers-2/3954-2/
ACADEMIC THESES ABOUT CVT:
Tempesta, M. (2024).
Reframing registration: A study examining the laryngeal configuration and perceived acoustical strategies of western operatic singers from the perspective of the Complete Vocal Technique
Doctoral Thesis, New England Conservatory, Boston, USA.
Bengtsson Espinoza, A., & Paulsson, E. (2024).
Utvärdering av Complete Vocal Technique vid behandling av åldersrelaterad glottisk atrofi – en pre-experimentell single-subject studie.
Master’s Thesis at Lunds University, Sweden. http://lup.lub.lu.se/student-papers/record/9160840
Myklebust, S. (2023).
“Som å snakke fem språk” Ein kvalitativ studie av songlærarar sine erfaringar med læringstypar i songundervisning.
Master’s Thesis at Bergen University, Psychological Faculty, Norway. https://nva.sikt.no/registration/0198f1dbc9bc-3ee840d8-f66c-4452-96e2-402a4ed6f881
CVT PAPERS FROM OTHERS:
An auditory-perceptual study investigating whether professional singing teachers of classical styles and contemporary styles, as well as clinical personnel, can distinguish between the rough vocal effects as classified in CVT.
Pinto C.M. (In Press, Corrected Proof, epub May 6, 2023).
Listeners’ Perception of Vocal Effects During Singing.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(23)00123-6/abstract
Paper on the subject of musical taste and how taste in musicians develops and changes in the context of teaching singing.
von Germeten, G. (2022)
We are also music lovers: Testing vocal tastes in higher musical theatre education.
Research Studies in Music Education. https://journals.sagepub.com/doi/full/10.1177/1321103X221081787
An article comparing the physiology and acoustics of Edge, classical singing and Kulning when singing loudly in the high part of the voice.
Ikävalko, T., Laukkanen, A.-M., McAllister, A., Eklund, R., Lammentausta, E., Leppävuori, M., & Nieminen, M. T. (In Press, Corrected Proof, epub March 8, 2023).
Three Professional Singers’ Vocal Tract Dimensions in Operatic Singing, Kulning, and Edge—A Multiple Case Study Examining Loud Singing.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(22)00025-X/fulltext
Paper using CVT terminology to develop a musical theatre language describing singers’ expressive choices beyond the notes in sheet music.
von Germeten, G. (2021).
Exploring Original Cast Recordings as “Vocal Scripts”: Navigating “Vocal Omnivorousness” and Learning “The Sungs” of Musical Theatre.
Voice and Speech Review, 1-17. https://doi.org/10.1080/23268263.2021.2010898
Paper on Reduced Density Overdrive in a high and in a low pitch using CT and formant analysis.
Saldias, M., Laukkanen, A., Guzman, M., Miranda, G., Stoney, J., Alku, P., Sundberg, J. (2020).
The Vocal Tract in Loud Twang-Like Singing While Producing High and Low Pitches.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(20)30057-6/abstract
Paper on all modes using MRI characterizing Vocal Tract Dimensions in the Vocal Modes using Magnetic Resonance Imaging
Leppävuori, M., Lammentausta, E., Peuna, A., Bode, MK., Jokelainen, J., Ojala, J., Nieminen, M. (2020).
Characterizing Vocal Tract Dimensions in the Vocal Modes using Magnetic Resonance Imaging.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(19)30300-5/abstract
Dysphonia paper explaining the differences between hyperfunctional dysphonia (pressed or tense phonation) and Overdrive, and why Overdrive is healthy and hyperfunction is not.
Saldias, M., Guzman, M., Miranda, G., Laukkanen, A.M. (2018).
A Computerized Tomography Study of Vocal Tract Setting in Hyperfunctional Dysphonia and in Belting.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(17)30432-0/abstract
Effect paper describing air added to the voice, Creak, Creaking, Grunt, Growl, and Rattle.
Caffier, P., Nasr, A., Rendon, M., Wienhausen, S., Forbes, E., Seidner, W., Nawka, T. (2017).
Common Vocal Effects and Partial Glottal Vibration in Professional Nonclassical Singers.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(17)30071-1/abstract
Overdrive paper describing the subglottal pressure of Overdrive as compared to falsetto.
Sundberg, J., Bitelli, M., Holmberg, A., Laaksonen, V. (2017).
The “Overdrive” Mode in the “Complete Vocal Technique”: A Preliminary Study.
Journal of Voice. https://www.jvoice.org/article/S0892-1997(16)30509-4/abstract