Medidas acústicas de fonte glótica de vozes masculinas normais

Abstract

TEMA: características vocais acústicas de homens jovens adultos. OBJETIVO: caracterizar as medidas acústicas da fonte glótica de homens adultos jovens com voz e laringe normais e compará-las ao padrão do software usado. MÉTODO: foram selecionados 25 sujeitos do sexo masculino, voz e laringe normais, faixa etária de adulto jovem (20 a 40 anos). Todos tiveram a emissão da vogal [a] analisada pelo Multi Dimensional Voice Program Advanced (MDVPA). Foi realizada a distribuição normal dos resultados de cada medida do programa através do Teste Lilliefords, com nível de significância de 5%. Os parâmetros que tiveram distribuição normal tiveram suas médias comparadas ao padrão de normalidade proposto pelo programa através do Teste t, com nível de significância de 5%. Resultado: o grupo foi caracterizado por 18 médias de medidas acústicas. As medidas de perturbação de frequência e de amplitude foram as que mais se distanciaram da normalidade, apresentando valores altos. Aproximadamente a metade das medidas apresentou distribuição normal. CONCLUSÃO: em homens adultos jovens com voz e laringe normais, as medidas de jitter e de shimmer mostraram-se altas e as de frequência fundamental, de ruído e de instabilidade ficaram dentro do esperado. Aproximadamente a metade das medidas apresentou distribuição normal, predominando as de jitter e de shimmer, podendo ser utilizadas como referência.

Qualidade de vida em voz, avaliação perceptivoauditiva e análise acústica da voz de professoras com queixas vocais

“…These data support the findings of other studies, which showed a complex and indirect relationship between actual vocal problems and the perception of the subjects, since the impact of dysphonia on quality of life depends on the individual characteristics and styles, by making them not to correlate with the severity or prognosis of voice disorder (3,21) . There was a positive correlation between the overall degree of voice alteration with SPI measure and the presence of noise at high frequencies in the WB, and expected that the greater the presence of aperiodic energy in the voice signal is, the higher the level of change is perceived (22) (Table 3). SPI analyzes the lack of high-frequency harmonic components, which may suggest, also, glottal closure changes with presence of breathiness.…”

“…In this research, the roughness correlated positively with suggestive measures of the presence of SPI NSH noise and positively too, with the largest and most darkening and definition of F1 ( Table 3). The presence of sub-harmonic components (NSH) of low-intensity among harmonics indicates the presence of generalized noise, it could correspond also to the diplophonia or crepitation (18,22) . SPI suggests lack of harmonic energy at high frequencies, with change in glottal closure (18) .…”

Vocal acoustic and auditory-perceptual measures, vocal complaints and professional characteristics of teachers from the city of Santa Maria (Rio Grande do Sul), Brazil

“…In the acoustic analysis, all measures of frequency perturbation (jitter), amplitude perturbation (shimmer) (22)(23)(24)(25)(26) , voiceless or unvoiced segments and harmonic sub-segments were above normal rates, and so were STD and SPI (Table 1). These results, when analyzed together, suggest the presence of noise and instability in the glottal signal.…”

“…Measures of voiceless or unvoiced segments are associated with irregular voice and characterize disrupted periodicity of the sound wave, reflected as noise or irregular emission (24,26) . The presence of low-intensity subharmonic components between the harmonics may indicate the presence of noise (23,26) , such as hoarseness.…”

“…The presence of low-intensity subharmonic components between the harmonics may indicate the presence of noise (23,26) , such as hoarseness.…”