Table 2.
Relevant information of included publications
| # | Title | Last Name, Year, Country | Journal | Sample size by gender | Parameters evaluated |
|---|---|---|---|---|---|
|
| |||||
| 1 | Vocal Fatigue in prospective vocal professionals | Anand et al., 2019, USA | Journal of Voice | 28 undergraduate and graduate students from SLP | SD SPL (dB) - fo (Hz) - fo standard deviation (Hz) - Pitch Strength - CPPS (dB) - AVQI |
| 2 | Vocal Dose of preservice music therapists’ preservice music teachers, and other undergraduate students | Jeremy et al., 2019, USA | Journal of Voice | 8 students from different careers | fo (Hz) |
| 3 | Vocal fatigue in doctors: evaluation with subjective and objective acoustic parameters | Erkan et al., 2020, Turkey | Logopedics Phoniatrics Vocology | 30 medical volunteers (15 men and 15 women) | fo (Hz) - Jitter (%) - Shimmer (%) - HNR |
| 4 | Muscle Tension Dysphonia: Experience from a Conflict Zone | Ali et al., 2020, India | Indian Journal of Otolaryngology and Head & Neck Surgery | 72 subjects diagnosed with muscle tension dysphonia (MTD) | GRBAS |
| 5 | Acoustic Analysis of Indian Teachers’ Voice: Pre and Post Teaching Circumstances | Alexander et al., 2017, India | Indian Journal of Otolaryngology and Head & Neck Surgery | 30 elementary school teachers, (15 male and 15 female) | fo (Hz) - Jitter (%) - Shimmer (%) - HNR - SPL (dB) |
| 6 | Dynamically Monitoring Vocal Fatigue and Recovery Using Aerodynamic, Acoustic, and Subjective Self-Rating Measurements | Xue et al., 2018, China | Journal of Voice | 10 undergraduate and graduate students (6 males and 4 females) | PTP - fo (Hz) - Jitter (%) - Shimmer (%) - HNR |
| 7 | Respiratory and Laryngeal Function in Teachers: Pre- and Post-vocal Loading Challenge | Herndon et al., 2017, USA | Journal of Voice | 12 occupational voice users (3 males and 9 females) | CPP - LHR |
| 8 | Effects of added absorption on the vocal exertions of talkers in a reverberant room | Rollins et al., 2019, USA | The Journal of the Acoustical Society of America | 32 university students (16 men and 16 women) | T20 - EDT - C50 (dB) - STI - Gramo RG (dB) |
| 9 | Trajectories in classroom acoustics: Vocal behavior of teachers | Astolfi, 2018, Italy | The Journal of the Acoustical Society of America | Active teachers | SPL (dB) - Dt - fo (Hz) - CPPS |
| 10 | Voice Use Among Music Theory Teachers: A Voice Dosimetry and Self-Assessment Study | Schiller et al., 2017, Belgium | Journal of Voice | 13 music theory teachers (4 men and 9 women) | fo (Hz) - voice SPL (dB) - SPL (dB) - VLI - Phonation time (%) |
| 11 | Relationship between Activity Noise, Voice Parameters, and Voice Symptoms among Female Teachers | Pirilä et al., 2017, Finland | Folia Phoniatrica et Logopaedica | 24 female elementary school teachers. | SPL (dB) - fo (Hz) - HNR |
| 12 | Development of a System for Quantitative Assessment of Vocal Loading | Mahalakshmi et al., 2018, India | Advances in Systems, Control and Automation | 25% of the U.S. population. | fo (Hz) - Dt - DD - Dc - De |
| 13 | Long-Time Voice Accumulation During Work, Leisure, and a Vocal Loading Task in Groups with Different Levels of Functional Voice Problems | Whitling et al., 2016, Sweden | Journal of Voice | 50 women 20 with functional dysphonia; 10 with high vocal load with voice complaints; 10 with high daily vocal load without voice complaints; and 10 healthy voice controls, | Voice SPL (dB) - Background noise (dB) - fo (Hz) - Phonation time (%) |
| 14 | The Interaction of Surface Hydration and Vocal Loading on Voice Meas ures | Fujiki et al., 2016, USA | Journal of Voice | 16 normophonic subjects (8 males- 8 females). | CPP - fo (Hz) |
| 15 | Voice Changes in Real Speaking Situations during a Day, with and Without Vocal Loading: Assessing Call Center Operators | Boaz et al., 2015, Israel | Journal of Voice | 27 subjects (7 males- 20 females). | SPL (dB) - fo (Hz) |
| 16 | Vocal Effects in Military Students Submitted to an Intense Recruit Training: A Pilot Study | Nascimiento et al., 2015, Brazil | Journal of Voice | 83 male soldiers. | fo (Hz) - Jitter (dB) HNR (dB) - Brightness (dB) - Intensity (dB) |
| 17 | Acoustic comfort in high-school classrooms for students and teachers | Puglisi et al., 2015, Italy | Energy Procedia | 37 teachers | SPL (dB) - fo (Hz) - Phonation time (%) |
| 18 | How classroom acoustics affect the vocal load of teachers | Durup et al., 2015, Great Britain | Energy Procedia | 20 primary and secondary school teachers (6 males - 14 females). | SPL (dB) - fo (Hz) - Total phonation time (%) - LAeq ((dB) - Tmf (seconds) |
| 19 | Discriminant capacity of acoustic, perceptual, and vocal self: The effects of vocal demands | Cortes et al., 2014, Brazil | Journal of Voice | 73 women from different professions. | fo (Hz) - GRBAS - Loudness (dB) |
| 20 | Effects of vocal demands on voice performance of student singers | Franca et al., 2014, USA | Journal of Voice | 8 university music students with specialization in voice. | RAP - fo (Hz) - Brigthness - NHR (dB) - VTI - SPL (dB) - MAFV |
| 21 | Comparison of vocal loading parameters in kindergarten and elementary school teachers | Remacle et al., 2013, Belgium | Journal of Speech, Language, and Hearing Research | 32 female teachers (12 kindergarten - 20 elementary school) | fo (Hz) - SPL (dB) - Dt - DD - Dc |
| 22 | Acoustic parameters and salivary IL-6 levels in overweight and obese teachers | Acurio et al., 2014, Chile | Journal of Voice | 33 teachers at school with normal voices | HNR - MPT - fo (Hz) - Frequency disturbance - Jitter local (dB) Jitter rap (dB) - Brightness |
| 23 | EGG and acoustic analyses of different voice samples: Comparison between perceptual evaluation and voice activity and participation profile | Kankare et al., 2013, Egypt | Folia Phoniatrica et Logopaedica | 93 kindergarten teachers. | SPL (dB) - fo (Hz) |
| 24 | A comparison of vocal demands with vocal performance among classroom student teachers | Franca, 2012, USA | Journal of Communication Disorders | 11 university students. | fo (Hz) - NHR - VTI - SPL - Jitter (dB) - Shimmer |
| 25 | Relationship between vocal doses and voice disorders on primary school teachers | Astolfi et al., 2012, Italy | Euronoise | 29 teachers (2 men - 27 women) | Jitter (%) - Brightness (%) - fo (Hz) - SPL (dB) - Smooth phonation index |
| 26 | Vocal impact of a prolonged reading task at two intensity levels: Objective measurements and subjective self-ratings | Remacle et al., 2011, Belgium | Journal of Voice | 50 female teachers | fo - Jitt (%) - Shim (%) - NHR - flow - fHigh - Range |
| 27 | The effect of voice amplification on occupational vocal dose in elementary school teachers | Gaskill et al., 2011, USA | Journal of Voice | 2 teachers | fo - Dc - DD - K cycle - SPL - DD per hour(m/h) |
| 28 | Vocal load investigations on primary school teachers | Bottalico et al, 2011, Italy | The Journal of the Acoustical Society of America | 40 elementary school teachers (4 men - 36 women) | SPL (dB) - fo (Hz) |
| 29 | Voice amplification as a means of reducing vocal load for elementary music teachers | Morrow and Connor, 2010, USA | Journal of Voice | 7 primary teachers (1 man and 6 women) | SPL (dB) - MPT (min) - fo (Hz) - Cycle Dose (millions) - Dd (m) |
| 30 | Comparison of voice-use profiles between elementary classroom and music teachers | Morrow and Connor, 2010, USA | Journal of Voice | 12 Teachers (1 man and 11 women) | MPT (min) - fo (Hz) - Vocal intensity |
| 31 | Measurement of vocal doses in virtual classrooms | Bottalico et al., 2010, Italy | Internoise | 22 subjects with normal voices (11 men and 11 women) | SPL (dB) - fo (Hz) - Dt (min) - VLI - Dd (m) - De - Dr |
| 32 | Investigation of Vocal Fatigue Using a Dose-Based Vocal Loading Task | Lei et al., 2020, Canada | Applied Sciences | 10 normal voices subjects (women) | fo (Hz) - SPL (dB) - CPP (dB) - TILT (dB) - HRF (dB) - jitter (%) - shimmer (%) |
| 33 | The impact of a standardized vocal loading test on vocal fold oscillations | Echternach et al., 2020, Germany | European Archives of Oto-Rhino-Laryngology | 23 subjects without vocal training (12 men and 11 women) | fo (Hz) - SPL (dB) - MPT (min) - DSI (dB) - OQ - GAW |
| 34 | Vocal Loading and Environmental Humidity Effects in Older Adults | Sundarrajan et al., 2017, India | Journal of Voice | 13 normal voices subjects (5 men and 8 women) | CPP (dB) - LHR (dB) - PTP (cmH2O) - fo (Hz) - PPE |
| 35 | Comparison of Habitual and High Pitch Phonation in Teachers with and Without Vocal Fatigue | Abi and Santosh, 2020, India | Journal of Voice | 60 teachers (women) | fo (Hz) - Minimum fo (Hz) - Jitter (%) - RAP (%) - PPQ (%) - SPPQ (%) - NHR (Hz)- CPP (dB) - CPPS (dB) |
| 36 | Immediate Impact of Vocal Demand on Musical Theater Singers in Brazil | Pacheco and Behlau, 2018, Brazil | Journal of Voice | 264 musical theater singers (138 men and 126 women) | fo (Hz) |
| 37 | Design of a clinical vocal loading test with long-time measurement of voice | Whitling et al., 2014, Sweden | Journal of Voice | 11 normal voices subjects (5 men and 6 women) | PTP (cmH2O) - SPL (dB) |
| 38 | Vocal Loading in Speaking a Foreign Language | Järvinen and Laukkanen, 2015, Finland | Folia Phoniatrica et Logopaedica | 43 native Finnish and English speakers (22 men and 21 women) | Leq (cm) - fo (Hz) - Alpha ratio (dB) |
| 39 | Measuring Voice Effects of Vibrato-Free and Ingressive Singing: A Study of Phonation Threshold Pressures | Fornhammar et al., 2020, Germany | Journal of Voice | 4 opera singers (2 men and 2 women) | PTP (cmH2O) - fo (Hz) - SPL (dB) |
| 40 | Change of vocal capacity due to different vocal loading tests | Echternach et al., 2013, Germany | Laryngo-Rhino-Otol | 17 teacher training students (6 men and 11 women) | SPL (dB) - fo (Hz) |
| 41 | Influence of Smartphones and Software on Acoustic Voice Measures | Grillo et al., 2016, USA | International Journal of Telerehabilitation | 10 Norwegian-speaking men and women | fo (Hz) - Jitter (%) - Shimmer (%) – NHR (Hz) - CPP (dB) - AVQI |
| 42 | The use and role of the Ambulatory Phonation Monitor (APM) in voice assessment | Nacci et al., 2013, Italy | Acta Otorhinolaryngol Italica | 10 primary school teachers | SPL (dB) - fo - Dt (min) |
| 43 | Impact of vocal load on breathiness: perceptual evaluation | Remacle et al., 2014, Belgium | Logopedics Phoniatrics Vocology | 50 normal voices subjects (female) | SPL (dB) - fo (Hz) |
| 44 | Collision and phonation threshold pressures before and after loud, prolonged vocalization in trained and untrained voices | Enflo et al., 2013, Sweden | Journal of Voice | 10 normal voices subjects (8 males and 2 females) | PTP (cmH2O) - Psub |
| 45 | Speech and Language Pathologists’ Voice Use in Working Environments: A Field Study Using Ambulatory Phonation Monitoring | Mozzanica et al., 2017, Switzerland | Folia Phoniatrica et Logopaedica | 28 pathologists (women) | fo (Hz) - SPL (dB) - Total cycles of vibration |
| 46 | Voice disorders in primary school teachers | Lira et al., 2014, Italy | Acta Otorhinolaryngol Italica | 157 teachers (2 men and 155 women) | Jitter (%) - fo (Hz) - Shimmer (%) - vAm (%) - NHR (Hz) - Vti - SPi - FTri (%) - ATri (%) - dVB (%) - dSh (%) |
| 47 | Natural Voice Use in Patients with Voice Disorders and Vocally Healthy Speakers Based on 2 Days Voice Accumulator Information from a Database | Soedersten et al., 2014, Sweden | Journal of Voice | 20 patients with voice disorders (4 males and 16 females) | fo (Hz) - NHR (Hz) - SPL (dB) - Phonation ratio |
| 48 | Acoustic analysis of the voice: Temporal, spectral and cepstral measurements in the normal voice with the Praat in a sample of Spanish speakers | Delgado et al., 2017, Spain | Revista de Investigación en Logopedia | 50 Spanish speakers with normal voices (25 men and 25 women) | fo (Hz) - RAP (%) - Noise parameters - Long-term average spectrum parameters |
| 49 | The Voice Range Profile: Its Function, Applications, Pitfalls and Potential | Ternström et al., 2016, Sweden | Acta Acustica United with Acustica | 30 Swedish with normal voices (men) | fo (min) - fo (max) - fo (range) - SPL (dB) - ST× (dB) |
| 50 | Occupational Vocal Health of Elite Sports Coaches: An Exploratory Pilot Study of Football Coaches | Buckley et al., 2014, Australia | Journal of Voice | 12 Australian soccer coaches (men) | fo (Hz) - SPL (dB) - MPT (%) |
| 51 | Teachers’ Voice Use in Teaching Environments: A Field Study Using Ambulatory Phonation Monitor | Lyberg et al., 2014, Belgium | Journal of Voice | 14 teachers (2 men and 12 women) | SPL (dB) - fo (Hz) - MPT (%) |
| 52 | Measuring Vocal Function in Professional Music Theater Singers: Construct Validation of the Evaluation of the Ability to Sing Easily (EASE) | Phyland et al., 2014, USA | Folia Phoniatrica et Logopaedica | 284 singers (127 men and 157 women) | EASE - VC |
| 53 | Speaking Fundamental Frequency and Phonation Time during Work and Leisure Time in Vocally Healthy Preschool Teachers Measured with a Voice Accumulator | Szabo et al., 2013, Sweden | Folia Phoniatrica et Logopaedica | 12 female preschool teachers with normal voices (women) | MPT - fo (Hz) - Relative phonation time |
| 54 | Preliminary results of a computer-assisted vocal load test with 10-min test duration | Hanschmann et al., 2010, Germany | European Archives of Oto-Rhino-Laryngology | 46 normal voices subjects (12 men and 34 women) | SPL (dB) - VLI - vocal self-perception |