Research Article| Volume 37, ISSUE 3, P362-365, May 2023

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Normative Speech Data in Professional Opera Singers- A Retrospective Study


      The term “singer” refers to a population of individuals who perform musical songs or related artistic material using their voices. Research has indicated that, as a population, singers’ voice parameters differ from the non-singer population. Given the fact that diagnosed voice pathologies are more prevalent in the singer population, normative speech data in singers are necessary for diagnosis and for outcome analysis.


      The purpose of this study was to compare objective voice parameters for the professional opera singer population with KAYPENTAX CSL normative values.


      Medical records of students at an elite opera conservatory who came into the senior author's (RTS) office for a baseline evaluation were reviewed retrospectively. All subjects had no voice complaint and had not undergone voice surgery. Subjects with vocal fold mass and scar were excluded. All subjects had undergone objective voice measurements by one of three board certified speech-language pathologists using the KAYPENTAX CSL (computerized Speech Lab) protocol. Mean, standard deviation, median and range were compared with normative values provided by KAYPENTAX CSL.


      Twenty-seven elite opera conservatory students (11 females and 16 males, ages 21-29 years) were included in the study. There were significant differences between singers and normative values of KAYPENTAX CSL. Among men, the jitter, relative average perturbation and noise- to- harmonic ratio among singers were significantly lower than KAYPENTAX CSL normative values. Among the females, the shimmer percent of singers was significantly higher than KAYPENTAX CSL normative values.


      Our findings indicate that singers may have different normative voice parameters. However, further research is needed to confirm or refute these findings, and similar studies are needed for singers in other genres.

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        • Maruthy S
        • Ravibabu P
        Comparison of dysphonia severity index between younger and older carnatic classical singers and nonsingers.
        J Voice. 2015; 29: 65-70
        • Awan SN
        • Ensslen AJ
        A comparison of trained and untrained vocalists on the dysphonia severity index.
        J Voice. 2010; 24: 661-666
        • Prakup B
        Acoustic measures of the voices of older singers and non-singers.
        J Voice. 2012; 26: 341-350
      1. Schloneger MJ, Hunter EJ. Assessments of voice use and voice quality among College/University singing students ages 18-24 through ambulatory monitoring with a full accelerometer signal. J Voice.

        • Brown WS
        • Rothman H
        • Sapienza CM
        Perceptual and acoustic study of professionally trained versus untrained voices.
        J Voice. 2000; 14 (J.): 301-309
        • Gunjawate DR
        • Ravi R
        • Bellur R
        Acoustic analysis of voice in singers: a systematic review.
        J Speech Lang Hear Res. 2018; 61 (Online): 40-51
        • Romak J.J.
        • Heuer R.J.
        • Hawkshaw M.J.
        • et al.
        The clinical voice laboratory.
        Professional Voice: The Science and Art of Clinical Care, 3-Volume Set. 2017; 405: 883
        • Schneider B
        • Zumtobel M
        • Prettenhofer W
        • et al.
        Normative voice range profiles in vocally trained and untrained children aged between 7 and 10 years.
        J Voice. 2010; 24: 153-160
        • Milovanovic J
        • Vukasinovic M
        • Jotic A
        • et al.
        Relationship between socio-demographic characteristics and vocal fold nodules, polyps and oedema.
        Acta Otorhinolaryngol Ital. 2018; 38: 424-430
        • Guss J
        • Sadoughi B
        • Benson B
        • et al.
        Dysphonia in performers: Toward a clinical definition of laryngology of the performing voice.
        J Voice. 2014; 28: 349-355
        • Sone M
        • Katayama N
        • Kato T
        • et al.
        Prevalence of laryngopharyngeal reflux symptoms.
        Otolaryngol Head Neck Surg. 2012; 146: 562-566
        • Reulbach TR
        • Belafsky PC
        • Blalock PD
        • et al.
        Occult laryngeal pathology in a community-based cohort.
        Otolaryngol Head Neck Surg. 2001; 124: 448-450
        • Milstein CF
        • Charbel S
        • Hicks DM
        • et al.
        Prevalence of laryngeal irritation signs associated with reflux in asymptomatic volunteers: impact of endoscopic technique (Rigid vs. Flexible Laryngoscope).
        The Laryngoscope. 2009; 115: 2256-2261
        • Koufman JA
        • Postma GN
        • Cummins MM
        • et al.
        Vocal fold paresis.
        Otolaryngol Head Neck Surg. 2000; 122: 537-541
        • Patel A
        Recommended protocols for instrumental assessment of voice: american speech- language-hearing association expert panel to develop a protocol for instrumental assessment of vocal function.
        Am J Speech Lang Pathol. 2018; 27: 887-905