Effects of caffeine on vocal acoustic and aerodynamic measures of adult females

Franca, Maria Claudia; Simpson, Kenneth O.; Schuette, Allison

doi:10.1590/s2317-17822013000300010

Cited by 9 publications

(20 citation statements)

References 26 publications

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“…The voice conveys a wealth of information about a speaker and is altered during different emotional states, differing environments and reflects an overall state of health of the body and the mind (Colton, Casper & Leonard, 2006). Normal voice production, however, requires balance and synchronicity amongst three components, namely: respiration, phonation and resonance (Franca, Simpson & Schuette, 2013;Ferrand, 2011. When these mutually dependent components work in perfect harmony, voice quality is optimized.…”

Section: Parameters Of Voice Productionmentioning

confidence: 99%

“…Phonation threshold pressure (PTP) Minimum amount of subglottal pressure needed to set the vocal folds into vibration . Sound pressure level A measure of the voice intensity (Franca, Simpson & Schuette, 2013). Voice turbulence index (VTI) Refers to the deviance from normal voice (Hamdan, et al, 2011).…”

Section: Harmonics-to-noise Ratio (H/n)mentioning

confidence: 99%

“…Ways of reducing the body to a hypohydrated state may include, consuming diuretics such as alcohol or caffeine or by minimizing the intake of fluids. Caffeine and alcohol are said to induce frequent urination which can ultimately cause body dehydration if these liquids are not replenished (Franca, Simpson & Schuette, 2013).…”

Section: Dehydrationmentioning

confidence: 99%

“…These adverse alterations can result in greater contact time between the vocal folds and increased pulmonary effort for phonation . The delicate larynx, therefore requires proper care (Franca, Simpson & Schuette, 2013), considering these high intensity and long endurance muscle activities have been reported to be especially susceptible to dehydration .…”

Section: Hydration Of the Vocal Foldsmentioning

confidence: 99%

“…It calls for a three-tiered approach that combines client preferences and values within the framework of evidence and expertise of clinicians, as evidenced in Figure 2 below . It is thus vital to obtain accurate information and empirical data in order to provide clinical advice and develop preventative programs (Franca, Simpson & Schuette, 2013). This systematic review is necessary to ensure EBP is provided for the voice population to improve the quality of services provided to clients with voice disorders (ASHA, 2004), and for the prevention of these disorders.…”

Section: Rationalementioning

confidence: 99%

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The Effect of Hydration on Voice Quality in Adults: A Systematic Review

et al. 2019

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Section: Parameters Of Voice Productionmentioning

confidence: 99%

Section: Harmonics-to-noise Ratio (H/n)mentioning

confidence: 99%

Section: Dehydrationmentioning

confidence: 99%

Section: Hydration Of the Vocal Foldsmentioning

confidence: 99%

Section: Rationalementioning

confidence: 99%

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The Effect of Hydration on Voice Quality in Adults: A Systematic Review

et al. 2019

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Vocal Hygiene in Collegiate Singers—Does Formal Training Relate to Practices?

et al. 2021

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The Effects of Caffeine on Voice: A Systematic Review

et al. 2023

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Background. Caffeine is considered a dehydrating agent due to its diuretic effects and influences the body's fluid balance. The relationship between voice and hydration has been widely investigated and it is accepted that inadequate hydration has detrimental effects on phonation. Since dehydration negatively affects the vocal folds and caffeine is considered a dehydrating agent, it can be hypothesized that voice might be negatively affected by caffeine intake. This systematic review aims to summarize and appraise the available evidence regarding the effects of caffeine on voice. Methods. Randomized and non-randomized experimental studies of healthy participants were retrieved following an electronic searching of six databases in June 2020. No publication, language or date restrictions were applied. Data extraction of relevant data and risk of bias assessment was conducted independently by two reviewers.Results. Five non-randomized experimental studies were deemed eligible for inclusion. The format of the administered interventions in the included studies was either liquid (coffee) or solid (caffeine tablets). Reported outcome measures used to examine the effects of caffeine on phonation consisted of acoustic, aerodynamic and (auditory & self-) perceptual. No measures were adversely affected by caffeine consumption. Conclusion. Clinicians commonly advise patients to refrain from caffeine, as caffeine intake increases diuresis with subsequent effects on fluid balance. Such imbalances can potentially induce dehydration which can be detrimental to phonation. This notion cannot be supported empirically, as the evidence is deemed unreliable and no firm conclusions can be elicited to guide clinical practice. The results of this review demonstrate the lack of research in the field and the necessity for future investigations in order to inform evidence-based practice through reliable and valid outcomes.

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Effects of caffeine on vocal acoustic and aerodynamic measures of adult females

Abstract: These results suggest that a conservative (100 mg) dosage of caffeine may not have an impact on vocal acoustics and aerodynamics.

Cited by 9 publications

References 26 publications

The Effect of Hydration on Voice Quality in Adults: A Systematic Review

The Effect of Hydration on Voice Quality in Adults: A Systematic Review

Vocal Hygiene in Collegiate Singers—Does Formal Training Relate to Practices?

The Effects of Caffeine on Voice: A Systematic Review

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