Acoustic and hearing-perceptual voice analysis in individuals with idiopathic Parkinson's disease in "on" and "off" stages.
OBJECTIVE
To evaluate the voice quality of patients with idiopathic Parkinson's disease, at the "on" and "off" moments of the disease.


METHODS
Five individuals with Parkinson's disease and five of the control group were assessed. All of them underwent the recording of voice and speech. The acoustic parameters analyzed were: fundamental frequency, jitter, shimmer, harmonic noise proportion and index of tremor, besides performing the hearing-perceptual analysis by means of GRBASI scale. The findings were analyzed using statistics through t test and the level of significance adopted was p < 0.05.


RESULTS
There was no difference in the acoustic parameters in the three analyzed groups. In the hearing-perceptual analysis, patients with idiopathic Parkinson's disease showed altered voice quality and the ones from the control group, neutral vocal quality.


CONCLUSIONS
Patients with idiopathic Parkinson's disease present rough, breathy and unstable vocal quality in both stages. In the acoustic analysis, there are no differences in the studied parameters.
Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
Luiza Lara M
LL
Santos
Larissa Oliveira Dos
LO
Reis
Iara
I
Bassi
Clara
C
Guzella
Francisco
F
Cardoso
César
C
Reis
Ana Cristina Côrtes
AC
Gama
D000368:Aged; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000150:complications* / Q000503:physiopathology; D012720:Severity of Illness Index; D013067:Speech Perception / Q000502:physiology*; D014832:Voice Disorders / Q000175:diagnosis / Q000209:etiology*