Phonatory function after prolonged voice use in brazilian woman

Abstract

OBJECTIVES: To evaluate the behavior of the phonatory function and the perceived strain in Brazilian young women, before and after a test of prolonged voice use test, for a period of one continuous hour.METHODS: Twenty young women without laryngeal disorders participated in the study and were submitted to vocal acoustic analysis (MDVP-Advanced, CSL-Kay Pentax(r)), perceptual voice assessment, carried out by five judges, and the measurement of speech-strain level using a visual analog scale before and after a prolonged use of the voice, from the reading of a standardized text for one hour in usual vocal intensity and frequency, without breaks for hydration or vocal rest. The description and comparison between the variables and the appropriate statistical analysis were carried out.RESULTS: The acoustic parameters of fundamental (f0) and low frequency (Flo) of the emission increased after 1 hour of voice use, while the values for the amplitude tremor intensity index (Atri), amplitude variation (vAm), noise-to-harmonic ratio (NHR), and soft phonation index (SPI) were reduced after the prolonged voice use test. The judges agreed with the decrease in the overall level of dysphonia (kappa=0.66), roughness (kappa=0.59), and vocal breathiness (kappa=0.73); increased phonatory stability (kappa=0.64); vocal projection (kappa=0.48); pitch (kappa=0.74); and loudness (kappa=0.65). The phonatory strain increased significantly after the test (p=0.003).CONCLUSION: One hour of prolonged voice use seems to favor laryngeal adaptation and increased adductor muscle activity to maintain vocal efficiency. However, the self-perception of vocal strain is evident and can be understood as a sign of muscle fatigue caused by continuous use.

Voz do ator: associação entre sintomas vocais e hábitos de vida

“…Concerning the record of signs and symptoms, throat clearing was self-reported in a higher percentage, which is consistent with findings of a research that consisted of 272 teachers (22) in the municipal network of São Paulo (82.4% of the case group, 64.8% of the control group, p=0.011). In general, this symptom is present among subjects who make excessive use of voice, who may have laryngopharyngeal reflux associated or not with the use of voice (15) .…”

“…The composition of the sample in this study with a higher percentage of male subjects (20) shows a different profile when compared to the researches that are usually performed with voice professionals, especially with teachers. In most of these studies, there is a predominance of female (7,18,21) subjects, which raises the hypothesis that the voice disorder is also associated with the female gender, considering its laryngeal aspects (22) .…”

Centro de força corporal, tempos máximos de fonação e pressão sonora de um grupo de mulheres saudáveis

“…At the same time, were evaluated the MPT. The volunteers remained in orthostatic position with the Behringer ECM 8000 microphone (frequency response from 15 kHz to 20 kHz) join it to professional digital recorder (Zoom H4n; 96 kHz, 16 bits, with 50% of the recorder signal level), Fixed in a pedestal and positioned in front and at 90° angle of the mouth (23) , keeping the distance of 4 cm between the microphone and the mouth, to capture the emissions of the vowel (24,25,26) . They were instructed to, after a maximum inspiration, sustain during an entire expiration, with a normal pitch and loudness, the vowel /a/, which was recorder and measured by seconds.…”

Dermatoglifia e condição vocal de professores universitários

“…Apesar de não ter sido encontrada significância estatística na associação entre dermatoglifia e tempo de profissão, averiguouse a tendência dos indivíduos com maior tempo de profissão a desenvolverem maior resistência muscular, possivelmente devido à própria adaptação da musculatura laríngea, ou mudança de fenótipo com tempo de uso (23,24) . Sendo assim, eles tendem a apresentar menor propensão para desenvolver sintomatologias vocais, como foi demonstrado por meio do ITDV geral.…”