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Published on: May 23, 2017
Fundamental frequency measures in the comparison of habitual and disguised voices
Amanda de Castro Matheus1, Denise de Oliveira Carneiro Berejuk2, Eliane Cristina Pereira1
1Departamento de Fonoaudiologia, Universidade Estadual do Centro-Oeste - UNICENTRO - Irati (PR), Brasil.
Purpose:
This study aimed to investigate the stability of measures of fundamental frequency of voice by comparing samples of habitual and disguised speech.
Methods:
This observational, analytical, cross-sectional study analyzed a voice bank of 40 people of both sexes (20 men and 20 women), aged 19 to 58 years. They read a passage in both habitual and disguised speech. The types of disguises were analyzed by three expert voice judges. The study used the PRAAT® acoustic analysis software to extract the mean f0, median f0, minimum f0, maximum f0, and base f0 (fb) from the complete reading in both situations, using pre-determined procedures. The data were tabulated and statistically analyzed.
Results:
The fb, maximum f0, and minimum f0 values were similar in habitual and disguised speech among speakers of both sexes, whereas the mean f0 and median f0 differed between the two situations.
Conclusion:
In general, the measures of fb, minimum f0, and maximum f0 were more stable in disguised speech, which may suggest future usefulness in intraindividual comparisons. The speakers' various types of adjustments to disguise their voices did not significantly alter the measures of fb, maximum f0, and minimum f0 in the comparison between habitual and disguised speech.
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