Vocal acoustic characteristics in pre-school aged children.
Evaluation is the first step for any treatment. Therefore, normal parameters are the bases for proper evaluation.


OBJECTIVE
Verify measures and vocal acoustic characteristics of 23 pre-school aged children of both genders, aged four to six years and eight months.


METHODS
The sampling process comprised a questionnaire -that was sent to parents, auditory screening and vocal-perception auditory assessment, based on the R.A.S.A.T. scale. Acoustic analysis was carried out through the Multi Dimensional Voice Program.


METHODS
Prospective and cross-sectional.


RESULTS
The noise-harmonic ratio (NHR) and frequency variation (vf0) of the total sample was higher than what was found for five and six-year-olds. As age increased, NHR values decreased. As the total mean of amplitude perturbation quotient (APQ) increased, vf0, variation of amplitude (vAm) soft phonation index (SPI) and NHR also increased; the same occurred between mean total NHR and vf0. As the total means of pitch perturbation quotient (PPQ) and voice turbulence index (VTI) increased, SPI mean value decreased.


CONCLUSIONS
The results of the acoustic parameters at the age of four years seem to show an immaturity of the structures and lack of neuro-muscular control at that age and the maturation process onset happens near five and six years old.
Cappellari
Viviane Michele
VM
UFSM, Brazil.
Cielo
Carla Aparecida
CA
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D013061:Speech Acoustics; D013067:Speech Perception / Q000502:physiology*; D014833:Voice Quality / Q000502:physiology*