Vocal Fatigue Index (VFI): Development and Validation

Nanjundeswaran, Chayadevie; Jacobson, Barbara H.; Gartner‐Schmidt, Jackie; Abbott, Katherine Verdolini

doi:10.1016/j.jvoice.2014.09.012

Cited by 232 publications

(150 citation statements)

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“…The VFI (7) was translated into Brazilian Portuguese by two Brazilian bilingual speech-language pathologists (Translator 1 -T1 and Translator 2 -T2), who conducted the conceptual translation. The translations were analyzed and compared by a committee of five speech-language pathologists specialized in voice with proficiency in English.…”

Section: Methodsmentioning

confidence: 99%

“…Vocal fatigue is also described as a symptom of vocal change or when associated with negative behaviors, as the cause of dysphonia (2) . Frequently, presence of vocal fatigue is assessed by the presence of a variety of symptoms (3)(4)(5) .Various definitions of vocal fatigue exist in the literature resulting in increased difficulty to accurately assess vocal fatigue from the patient perspective (6,7) . Recently, an American group of researchers developed and validated the Vocal Fatigue Index -VFI (7) , a tool that assists in the reliable identification of individuals with vocal fatigue.…”

Section: Introductionmentioning

confidence: 99%

“…Frequently, presence of vocal fatigue is assessed by the presence of a variety of symptoms (3)(4)(5) .Various definitions of vocal fatigue exist in the literature resulting in increased difficulty to accurately assess vocal fatigue from the patient perspective (6,7) . Recently, an American group of researchers developed and validated the Vocal Fatigue Index -VFI (7) , a tool that assists in the reliable identification of individuals with vocal fatigue. The American English protocol has 19 questions divided into three domains: tiredness of the voice and voice avoidance, physical discomfort associated with voicing, and improvement of symptoms with rest or lack thereof (7) .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, an American group of researchers developed and validated the Vocal Fatigue Index -VFI (7) , a tool that assists in the reliable identification of individuals with vocal fatigue. The American English protocol has 19 questions divided into three domains: tiredness of the voice and voice avoidance, physical discomfort associated with voicing, and improvement of symptoms with rest or lack thereof (7) . According to the international Scientific Advisory Committee of Medical Outcomes Trust standards (8) , any instrument must be validated to be used in another language and culture.…”

Section: Introductionmentioning

confidence: 99%

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Equivalência cultural da versão brasileira do Vocal Fatigue Index – VFI

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Nanjundeswaran

et al. 2017

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RESUMO O objetivo deste estudo foi desenvolver a equivalência cultural da versão brasileira do protocolo Vocal Fatigue Index – VFI. Dois fonoaudiólogos brasileiros bilíngues traduziram a versão original do VFI do inglês para o português. As traduções foram revisadas pelos pesquisadores e por um comitê de cinco fonoaudiólogos especialistas em voz, chegando-se a uma versão final do instrumento. Um terceiro fonoaudiólogo bilíngue retrotraduziu essa versão final e o mesmo comitê reviu as diferenças em relação à versão original. A versão final em português do protocolo VFI, assim como o original em inglês, é respondida de acordo com a frequência de ocorrência em que se experienciam os sintomas: 0 = nunca, 1 = quase nunca, 2 = às vezes, 3 = quase sempre e 4 = sempre. Para a equivalência cultural da versão em português, a opção “não aplicável” foi acrescida na chave de respostas e 20 indivíduos com queixa vocal e disfonia completaram o instrumento. Se alguma questão fosse considerada “não aplicável”, seria eliminada da versão brasileira do protocolo; nenhuma questão foi eliminada do instrumento. A versão em português brasileiro foi intitulada Índice de Fadiga Vocal – IFV e apresenta 19 questões, da mesma forma que o instrumento original. Dos 19 itens, 11 referem-se à fadiga e restrição vocal, 5, ao desconforto físico associado à voz e 3 à recuperação dos sintomas com o repouso. A versão para o português brasileiro do VFI apresenta equivalência cultural e linguística em relação ao instrumento original. A validação do IFV para o português brasileiro está em andamento.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Equivalência cultural da versão brasileira do Vocal Fatigue Index – VFI

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Moreti

Nanjundeswaran

et al. 2017

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“…The sensor is connected to a custom smartphone application (VHM) as the data acquisition platform, and the system records the unprocessed ACC signal at an 11,025-Hz sampling rate, 16-bit quantization, and 80-dB dynamic range to obtain frequency content of neck surface vibrations up to 5,000 Hz. The VHM application provides a user-friendly interface for starting and stopping recording, daily sensor calibration, smartwatch coupling, and periodic alert capabilities that include system checks (Mehta et al, 2012) and vocal fatigue questions (Nanjundeswaran, Jacobson, Gartner-Schmidt, & Abbott, 2015). An Android-based software platform permitted the modification of previous versions of the VHM app to incorporate novel voice activity detection, recording settings, and biofeedback settings.…”

Section: Methodsmentioning

confidence: 99%

Integration of Motor Learning Principles Into Real-Time Ambulatory Voice Biofeedback and Example Implementation Via a Clinical Case Study With Vocal Fold Nodules

Stan

Mehta

Petit

et al. 2017

Am J Speech Lang Pathol

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Purpose: Ambulatory voice biofeedback (AVB) has the potential to significantly improve voice therapy effectiveness by targeting one of the most challenging aspects of rehabilitation: carryover of desired behaviors outside of the therapy session. Although initial evidence indicates that AVB can alter vocal behavior in daily life, retention of the new behavior after biofeedback has not been demonstrated. Motor learning studies repeatedly have shown retentionrelated benefits when reducing feedback frequency or providing summary statistics. Therefore, novel AVB settings that are based on these concepts are developed and implemented. Method: The underlying theoretical framework and resultant implementation of innovative AVB settings on a smartphone-based voice monitor are described. A clinical case study demonstrates the functionality of the new relative frequency feedback capabilities. Results: With new technical capabilities, 2 aspects of feedback are directly modifiable for AVB: relative frequency and summary feedback. Although reduced-frequency AVB was associated with improved carryover of a therapeutic vocal behavior (i.e., reduced vocal intensity) in a patient post-excision of vocal fold nodules, causation cannot be assumed. Conclusions: Timing and frequency of AVB schedules can be manipulated to empirically assess generalization of motor learning principles to vocal behavior modification and test the clinical effectiveness of AVB with various feedback schedules.

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Effect of Vitamin B₁₂ Injection on the Vocal Performance of Professional Singers

Shoffel‐Havakuk

Lava

Reuven

et al. 2021

JAMA Otolaryngol Head Neck Surg

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IMPORTANCE One-third of singers and vocal professionals report experiencing a benefit from empirical vitamin B 12 injections for improvement of mild singing-related symptoms (eg, reduced stamina, vocal fatigue, and effort). However, there is no objective evidence to support or refute these claims.OBJECTIVE To assess the presence and magnitude of the effect of empirical vitamin B 12 injection on the vocal performance of singers. DESIGN, SETTING, AND PARTICIPANTSA randomized, double-blind, placebo-controlled, crossover trial was conducted from November 7, 2017, to November 30, 2018, at an academic voice center among 20 active adult singers without dysphonia but with mild vocal symptoms. Individuals with known or suspected vitamin B 12 deficiency or active or recent vitamin B 12 treatment were excluded. Analysis was on a per-protocol basis.INTERVENTIONS Participants were randomized to receive an intramuscular (deltoid) injection of either vitamin B 12 (1000 μg of cyanocobalmin) or placebo (0.9% sodium chloride). After a washout period of at least 4 weeks, participants were crossed over to receive the opposite injection. Both the investigators and participants were blinded to the order of injections. MAIN OUTCOMES AND MEASURESThe participants completed the Singing Voice Handicap Index-10 (SVHI-10), the Voice Fatigue Index (VFI), and the Evaluation of the Ability to Sing Easily (EASE) before each injection and at intervals of 1 hour, 3 hours, 24 hours, 72 hours, and 1 week after the injection. The primary time point assessment was 72 hours after injection, and the SVHI-10 score was the primary outcome measure. RESULTSTwenty singers (10 men; median age, 22 years [range, 19-42 years]) were enrolled. The improvements after either placebo or vitamin B 12 injections were comparable to each other. At 72 hours after the vitamin B 12 injection, the median difference in the SVHI-10 score was 1 (95% CI, -1 to 2) compared with 3 (95% CI, 0-4) after placebo. The median difference between differences at 72 hours between placebo and vitamin B 12 injections were 1.5 (95% CI, -2 to 5) for the SVHI-10, 1 (95% CI, -9 to 9) for the VFI, and -1 (95% CI, -3 to 2) for the EASE. The improvements after both injections failed to reach the estimated minimal clinically important difference. Of the 20 participants, 4 (20%) reached the estimated minimal clinically important difference in their SVHI-10 score after 72 hours for both vitamin B 12 and placebo injections.CONCLUSIONS AND RELEVANCE This randomized, double-blind, placebo-controlled, crossover trial found that after empirical vitamin B 12 injection to improve mild voice-related symptoms, the improvement in self-reported voice measures in singers shows no meaningful difference compared with placebo.TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT03437824

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Vocal Fatigue Index (VFI): Development and Validation

Cited by 232 publications

References 24 publications

Equivalência cultural da versão brasileira do Vocal Fatigue Index – VFI

Equivalência cultural da versão brasileira do Vocal Fatigue Index – VFI

Integration of Motor Learning Principles Into Real-Time Ambulatory Voice Biofeedback and Example Implementation Via a Clinical Case Study With Vocal Fold Nodules

Effect of Vitamin B₁₂ Injection on the Vocal Performance of Professional Singers

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Vocal Fatigue Index (VFI): Development and Validation

Cited by 232 publications

References 24 publications

Equivalência cultural da versão brasileira do Vocal Fatigue Index – VFI

Equivalência cultural da versão brasileira do Vocal Fatigue Index – VFI

Integration of Motor Learning Principles Into Real-Time Ambulatory Voice Biofeedback and Example Implementation Via a Clinical Case Study With Vocal Fold Nodules

Effect of Vitamin B12 Injection on the Vocal Performance of Professional Singers

Contact Info

Product

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Effect of Vitamin B₁₂ Injection on the Vocal Performance of Professional Singers