Standardization of acoustic measures for normal voice patterns.
Studies have established that normative data is necessary for acoustic analysis. The aim of the present study is to standardize fundamental frequency measures (fo), jitter, shimmer and harmonic-noise ratio (HNR) for young adults with normal voice.


METHODS
20 males and 20 females, between 20 and 45 years, without signs and symptoms of vocal problems; CSL-4300 Kay-Elemetrics; vowels /a/ and /é/.


RESULTS
for females, vowels /a/ and /é/ had average measures of: fo 205.82 Hz and 206.56 Hz; jitter of 0.62% and 0.59%; shimmer of 0.22 dB and 0.19 dB; PHR of 10.9 dB and 11.04 dB, respectively. For males, vowel /a/ and /é/ had average measures of: fo 119.84 Hz and 118.92 Hz; jitter of 0.49% and 0.5%; shimmer of 0.22 dB and 0.21 dB; HNR 9.56 dB and 9.63 dB, respectively. Both fo and NHR female measures were significantly higher than their male counterparts.


CONCLUSIONS
our results differ from the literature; therefore, it is important to standardize the program in use.
Naufel de Felippe
Ana Clara
AC
FFCLRP, USP, UNAERP, Brazil. anaedufelippe@netsite.com.br
Grillo
Maria Helena Marotti Martelletti
MH
Grechi
Thaís Helena
TH
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D012737:Sex Factors; D013061:Speech Acoustics; D013068:Speech Production Measurement / Q000592:standards*; D014831:Voice / Q000502:physiology*; D014833:Voice Quality