Classroom Noise and Teachers' Voice Production

2015 ◽  
Vol 58 (5) ◽  
pp. 1397-1406 ◽  
Author(s):  
Leena M. Rantala ◽  
Suvi Hakala ◽  
Sofia Holmqvist ◽  
Eeva Sala
Keyword(s):  
Fundamental Frequency ◽  
Ambient Noise ◽  
Noise Levels ◽  
Working Environments ◽  
Objective Metrics ◽  
Before And After ◽  
Working Day ◽  
Sound Spectrum ◽  
Voice Use ◽  
Lower Noise

Purpose The aim of this study was to research the associations between noise (ambient and activity noise) and objective metrics of teachers' voices in real working environments (i.e., classrooms). Method Thirty-two female and 8 male teachers from 14 elementary schools were randomly selected for the study. Ambient noise was measured during breaks in unoccupied classrooms and, likewise, the noise caused by pupils' activity during lessons. Voice samples were recorded before and after a working day. Voice variables measured were sound pressure level (voice SPL), fundamental frequency, jitter, shimmer, and the tilt of the sound spectrum slope (alpha ratio). Results The ambient noise correlated most often with the fundamental frequency of men and voice SPL, whereas activity noise correlated with the alpha ratio and perturbation values. Teachers working in louder ambient noise spoke more loudly before work than those working in lower noise levels. Voice variables generally changed less during work among teachers working in loud activity noise than among those working in lower noise levels. Conclusions Ambient and activity noises affect teachers' voice use. Under loud ambient noise teachers seem to speak habitually loudly, and under loud activity noise teachers' ability to react to loading deteriorates.

Fundamental Frequency and Formants Before and After Prolonged Voice Use in Teachers

2018 ◽  
Vol 32 (2) ◽  
pp. 177-184 ◽  
Author(s):  
Ariane Damasceno Pellicani ◽  
Alice Ramos Fontes ◽  
Francisco Flavio Santos ◽  
Aline Damasceno Pellicani ◽  
Lilian Neto Aguiar-Ricz
Keyword(s):  
Fundamental Frequency ◽  
Before And After ◽  
Voice Use

Aerodynamic and Acoustic Voice Measures Before and After an Acute Public Speaking Stressor

2020 ◽  
Vol 63 (10) ◽  
pp. 3311-3325
Author(s):  
Brittany L. Perrine ◽  
Ronald C. Scherer
Keyword(s):  
Fundamental Frequency ◽  
Salivary Cortisol ◽  
Public Speaking ◽  
Stress System ◽  
Before And After ◽  
Subglottal Pressure ◽  
Response To Stress ◽  
System Activation ◽  
Speaking Fundamental Frequency ◽  
Pituitary Adrenal Axis

Purpose The goal of this study was to determine if differences in stress system activation lead to changes in speaking fundamental frequency, average oral airflow, and estimated subglottal pressure before and after an acute, psychosocial stressor. Method Eighteen vocally healthy adult females experienced the Trier Social Stress Test (TSST) to activate the hypothalamic–pituitary–adrenal axis. The TSST includes public speaking and performing mental arithmetic in front of an audience. At seven time points, three before the stressor and four after the stressor, the participants produced /pa/ repetitions, read the Rainbow Passage, and provided a saliva sample. Measures included (a) salivary cortisol level, (b) oral airflow, (c) estimated subglottal pressure, and (d) speaking fundamental frequency from the second sentence of the Rainbow Passage. Results Ten of the 18 participants experienced a hypothalamic–pituitary–adrenal axis response to stress as indicated by a 2.5-nmol/L increase in salivary cortisol from before the TSST to after the TSST. Those who experienced a response to stress had a significantly higher speaking fundamental frequency before and immediately after the stressor than later after the stressor. No other variable varied significantly due to the stressor. Conclusions This study suggests that the idiosyncratic and inconsistent voice changes reported in the literature may be explained by differences in stress system activation. In addition, laryngeal aerodynamic measures appear resilient to changes due to acute stress. Further work is needed to examine the influence of other stress systems and if these findings hold for dysphonic individuals.

Cirugía de feminización de voz con técnica glotoplastia de Wendler en Barranquilla, Colombia. Voice feminization surgery with Wendler glottoplasty technique in Barranquilla, Colombia.

2018 ◽  
Vol 45 (4) ◽  
pp. 247-253 ◽  
Author(s):  
Antonio J. Ballestas ◽  
Samir A. Ballestas ◽  
Rocio Cuello
Keyword(s):  
Fundamental Frequency ◽  
Speech Therapy ◽  
Vocal Cords ◽  
Maximum Phonation Time ◽  
Study Materials ◽  
Before And After ◽  
Upper Face ◽  
Expert Surgeon ◽  
Frequency Maximum ◽  
Male To Female

Introducción: La glotoplastia de Wendler es la técnica que en la actualidad ofrece mejores resultados entre los diferentes tipos de cirugías para la feminización de la voz. Objetivo: Describir nuestra experiencia con la Glotoplastia de Wendler durante el proceso de feminización de la voz de mujeres transgénero. Diseño: Pseudoexperimental (antes-después) Materiales y Métodos: 36 pacientes transexuales en proceso de transformación de hombre a mujer se sometieron a cirugía y rehabilitación con terapias de voz con el equipo de VOICEFEM - Voice Feminization Colombia. La técnica utilizada consiste en la creación de una sinequia de las cuerdas vocales (CCVV) previa desepitelización de la cara interna del tercio anterior de las mismas, 2 puntos de sutura con Vicryl 4/0 y vaporización con electrocauterio en la región lateral de la cara superior de las CCVV y utilización de goma biológica en la sinequia creada. La medición de la frecuencia fundamental, el tiempo máximo de fonación, y la realización del cuestionario TSEQ, se llevaron a cabo antes y después de la cirugía. Resultados: Se obtuvo un aumento de la Frecuencia fundamental promedio de 112Hz(P<0.05) a los 6 meses posteriores al procedimiento quirúrgico y una disminución de cerca de 30 puntos en los resultados del cuestionario TSEQ. Conclusión: La glotoplastia de Wendler, llevada a cabo por cirujanos con experiencia en este campo, ofrece resultados favorables con aumentos significativos de la frecuencia fundamental a mediano plazo y debe estar necesariamente asociada al manejo postquirúrgico con terapias de voz, para obtener el desenlace óptimo esperado.Introduction: Wendler’s Glottoplasty is the technique that offers the best resultsamong the different types of voice feminization surgeries. Male to Female Transgender patients have in this technique the last step for their successful transformation. Objective: To describe our experience in carrying out Wendler’s glottoplasty during the process of feminization of the voice of transgender women. Design: Pseudoexperimental (before-after) study. Materials and methods: In 36 Male to Female Transgender patients, Wendler’s glottoplasty was conducted by VOICEFEM - Voice Feminization Colombia’s team, with further speech therapy rehabilitation. This technique consists of the creation of a synechia of the vocal cords which is carried out after the de-epithelization of the vocal cords on the inner face of its anterior third, 2 stitches with Vicryl 4/0 and vaporization with electrocautery in the lateral region of vocal cords upper face, and the use of biological glue in the created synechia. The measurement of the Fundamental Frequency, Maximum Phonation time, and the completion of the TSEQ questionnaire were carried out before and after the surgery. Results: There was an increase of 112 Hz in the average of Fundamental Frequency(P<0.05) 6 months after the surgery, and a decrease of approximately 30 points in the TSEQ questionnaire results. Conclusion: Wendler’s Glottoplasty conducted by an expert surgeon, provides positive results with a significant increase for fundamental frequency in the medium term, and it is imperative to do also voice therapy rehabilitation posterior to the procedure in order to obtain the expected optimal outcome.

scholarly journals A comparison of accommodation and ocular discomfort change according to display size of smart devices

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Jeong Woo Kang ◽  
Yeoun Sook Chun ◽  
Nam Ju Moon
Keyword(s):  
Display Size ◽  
Adverse Impact ◽  
Smart Devices ◽  
Accommodative Response ◽  
Quantitative Measurements ◽  
Objective Metrics ◽  
Ocular Discomfort ◽  
Before And After ◽  
Small Display ◽  
Ophthalmic Disease

Abstract Background To evaluate the change of accommodation and ocular discomfort according to the display size, using quantitative measurements of accommodation and ocular discomfort through subjective and objective metrics. Methods Forty six subjects without any ophthalmic disease history were asked to watch the documentary movie, using two different sizes of smart devices; smartphones and tablets. Before and after using devices, the near point accommodation (NPA) and the near point convergence (NPC) were measured, and objective accommodation was measured using an auto refractometer/keratometer. The subjective ocular discomfort was assessed through a survey. Results Both devices showed a decrease in post-use NPA and NPC, and the change after use of the smartphone was significantly severe, 1.8 and 2.5 folds respectively, compared to tablet (p = 0.044, p = 0.033, respectively). Neither smartphone nor tablet showed significant changes in the accommodative response induced by dynamic accommodative stimulus of auto refractometer/keratometer (p = 0.240 and p = 0.199, respectively). Subjects showed a more severe increase in ocular discomfort after using smartphones (p = 0.035) and reported feeling tired even with shorter use times (p = 0.012). Conclusions Both devices showed significant decreases in NPA and NPC, and the larger changes were seen when using the small display smartphone. Even within 20minutes of using, subjects start to feel ocular discomfort, and it was more severe and faster after smartphones than tablets. Therefore, the smaller the display size, the greater the adverse impact on eyes, and thus, appropriate display size will need to be selected depending on the time and purpose of use.

Effect of Mach number on the acoustic field of 2:1 elliptic-slot jet

2001 ◽  
Vol 105 (1043) ◽  
pp. 9-16 ◽  
Author(s):  
S. B. Verma ◽  
E. Rathakrishnan
Keyword(s):  
Mach Number ◽  
Fundamental Frequency ◽  
Acoustic Field ◽  
Major Axis ◽  
Shock Structure ◽  
Minor Axis ◽  
Noise Levels ◽  
Underexpanded Jets ◽  
Barrel Shock ◽  
Mach Numbers

Abstract The shock-structure and the related acoustic field of underexpanded jets undergoes significant changes as the Mach number Mj is increased. The present investigation is carried out to study the effect of Mach number on an underexpanded 2:1 elliptic-slot jet. Experimental data are presented for fully expanded Mach numbers ranging from 1.3 to 2.0. It is observed that the ‘cross-over’ point at the end of the first cell at low Mach numbers gets replaced by a normal shock at a highly underexpanded condition resulting in the formation of a ‘barrel’ shock along the minor-axis side with a ‘bulb’ shock formed along the major-axis side. The above change in shock structure is accompanied by a related change in the acoustic field. The amplitude of fundamental frequency along the minor-axis side grows with Mj but falls beyond Mj = 1.75. Along the major-axis side, however, the fundamental frequency does not exist at low Mach numbers. It appears at Mj = 1.75 but then falls at Mj = 2.0. The related azimuthal directivity of overall noise levels (OASPL) shows significant changes with Mj.

Influence of Wind-produced Noise on Orientation in the Sole (Solea solea)

1994 ◽  
Vol 51 (6) ◽  
pp. 1258-1264 ◽  
Author(s):  
J. P. Lagardère ◽  
M. L. Bégout ◽  
J. Y. Lafaye ◽  
J. P. Villotte
Keyword(s):  
Spatial Distribution ◽  
Ambient Noise ◽  
Sound Intensity ◽  
Weather Conditions ◽  
Fish Populations ◽  
Positioning System ◽  
Noise Levels ◽  
Orientation Behaviour ◽  
Solea Solea ◽  
Swimming Trajectories

Sole (Solea solea), telemetered in an enclosure using an acoustic positioning system, changed their swimming trajectories and orientation behaviour as a function of wind strength and direction. Monitoring of the spatial variation in both wind-generated currents and noise spectra in the enclosure indicates that these behavioural changes correspond to patterns in the spatial distribution of noise and to sound intensity. Thus, our observations indicate that sole perceives and reacts to horizontal variability in ambient noise levels. Such behaviour may be important in determining movements of fish populations at sea during poor weather conditions.

S254 – Bone Conduction Noise Exposure via Ventilators in the NICU

2008 ◽  
Vol 139 (2_suppl) ◽  
pp. P160-P160
Author(s):  
Angela P Black ◽  
James D Sidman
Keyword(s):  
Ambient Noise ◽  
Noise Exposure ◽  
Bone Conduction ◽  
Sound Level ◽  
Noise Levels ◽  
High Noise ◽  
Endotracheal Tubes ◽  
Level Meter ◽  
Hearing Damage ◽  
Air Conduction

Objectives To demonstrate that neonatal ventilators produce high noise levels through bone conduction (BC) via endotracheal tubes, as well as air conduction (AC) from ambient noise. Methods A sound level meter was used to measure the noise levels 4 feet from the ventilator and in direct contact at the end of a balloon attached to the ETT to simulate the noise presented to the infant. 3 commonly used neonatal ventilators (Sensormedics 3100A, VIP Bird and Bunnell Jet) were examined. Results Noise levels were significantly higher (6 – 14 dB) at the end of the ETT than 4 ft from the ventilator for all ventilators studied. Conclusions Previous studies have shown high ambient noise levels in NICUs, but have failed to address the actual noise presented to the infant. ETT transmission of noise as a direct bone stimulus through the skull has been overlooked. This study has shown that high noise intensities are being presented not only as AC, but as BC to the infants though the ETT. This study demonstrates, therefore, that ear protection alone will not save these at-risk infants from hearing damage. More must be done to decrease noise exposure and develop quieter machines.

scholarly journals Ambient noise levels in audiometric test rooms

1993 ◽  
Vol 93 (4) ◽  
pp. 2406-2406
Author(s):  
Tom Frank ◽  
Dennis L. Williams
Keyword(s):  
Ambient Noise ◽  
Noise Levels ◽  
Audiometric Test

scholarly journals The pitch of babies’ cries predicts their voice pitch at age 5

2018 ◽  
Vol 14 (7) ◽  
pp. 20180065 ◽  
Author(s):  
Florence Levrero ◽  
Nicolas Mathevon ◽  
Katarzyna Pisanski ◽  
Erik Gustafsson ◽  
David Reby
Keyword(s):  
Longitudinal Study ◽  
Individual Differences ◽  
Fundamental Frequency ◽  
Ring Finger ◽  
Small Sample ◽  
Voice Pitch ◽  
Same Sex ◽  
Before And After ◽  
Longitudinal Study Design ◽  
The Right

Voice pitch (fundamental frequency, F 0 ) is a key dimension of our voice that varies between sexes after puberty, and also among individuals of the same sex both before and after puberty. While a recent longitudinal study indicates that inter-individual differences in voice pitch remain stable in men during adulthood and may even be determined before puberty (Fouquet et al. 2016 R. Soc. open sci. 3 , 160395. ( doi:10.1098/rsos.160395 )), whether these differences emerge in infancy remains unknown. Here, using a longitudinal study design, we investigate the hypothesis that inter-individual differences in F 0 are already present in the cries of pre-verbal babies. While based on a small sample ( n = 15), our results indicate that the F 0 of babies' cries at 4 months of age may predict the F 0 of their speech utterances at 5 years of age, explaining 41% of the inter-individual variance in voice pitch at that age in our sample. We also found that the right-hand ratio of the length of their index to ring finger (2D : 4D digit ratio), which has been proposed to constitute an index of prenatal testosterone exposure, was positively correlated with F 0 at both 4 months and 5 years of age. These findings suggest that a substantial proportion of between-individual differences in voice pitch, which convey important biosocial information about speakers, may partly originate in utero and thus already be present soon after birth.

Effects of the reduction of aircraft noise emission due to the travel restriction during the COVID-19 pandemic at residential areas around Tan Son Nhat Airport

2021 ◽  
Vol 263 (1) ◽  
pp. 5114-5124
Author(s):  
Thulan Nguyen ◽  
Tran Thi Hong Nhung Nguyen ◽  
Bach Lien Trieu ◽  
Makoto Morinaga ◽  
Yasuhiro Hiraguri ◽  
...  
Keyword(s):  
Aircraft Noise ◽  
Residential Areas ◽  
Noise Levels ◽  
Noise Emission ◽  
Acoustic Environment ◽  
Comparison Results ◽  
Travel Restrictions ◽  
Before And After ◽  
The Impact ◽  
Travel Restriction

The travel restrictions caused by the epidemic outbreak in early 2020 worldwide have caused many changes in all aspects of life, especially in the acoustic environment. This study examines the impact of this environmental change at Tan Son Nhat International Airport (TSN), the largest airport in Vietnam, by comparing the situations before and after the airport stopped operating all international flights in March 2020. The after-the-change survey was conducted in 2 phases, June and September 2020, three months and six months after the stop decision. The number of flights observed in August 2019 was 728; this number is 413 and 299 for the two surveys in 2020. The range of noise levels estimated for 12 sites around TSN decreased from 63-81 dB in 2019 to 32-67 dB in June 2020 and 33-69 dB in September 2020. At the same aircraft noise level, the percentage of highly annoyed (% HA) and the percentage of insomnia (%ISM) in the 2020 survey are higher than those in the 2019 survey. The comparison results of reaction to noise before and after the TSN's noise change indicated an increase in negative responses to noise might happen in the increased noise and reduced noise situation.

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