Comparison of fundamental frequency and formants frequency measurements in two speech tasks

Abstract

Purpose: to compare the measurements of fundamental frequency (F0) and frequency of the first two formants (F1 and F2) of the seven oral vowels of the Brazilian Portuguese in two speech tasks, in adults without voice and speech disorders. Methods: eighty participants in the age range 18 and 40 years, paired by gender, were selected after orofacial, orthodontic and auditory-perceptual assessments of voice and speech. The speech signals were obtained from carrier phrases and sustained vowels and the values of the F0 and frequencies of F1 and F2 were estimated. The differences were verified through the t Test, and the effect size was calculated. Results: differences were found in the F0 measurements between the two speech tasks, in two vowels in males, and in five vowels, in females. In the F1 frequencies, differences were noted in six vowels, in men, and in two, in women. In the F2 frequencies, there was a difference in four vowels, in men, and three, in women. Conclusion: based on the differences found, it is concluded that the speech task for evaluation of fundamental frequency and formants’ frequencies, in the Brazilian Portuguese, can show distinct results in both glottal and supraglottal measures in the production of different oral vowels of this language. Thus, it is suggested that clinicians and researchers consider both forms of emission for a more accurate interpretation of the implications of these data in the evaluation of oral communication and therapeutic conducts.

Multiparametric Analysis of Speaking Fundamental Frequency in Genetically Related Speakers Using Different Speech Materials: Some Forensic Implications

“…In this regard, different studies within the clinical voice domain (i.e., vocology studies) support the observation that different acoustic outcomes regarding f 0 may be obtained depending on the task and consequently on the nature of the material under assessment (e.g., comparisons of sentences and sustained vowels), suggesting that for a more reliable assessment of the parameter, materials collected in more than one task have to be considered. 37,38,62,63 Although the differences observed in the present study on account of the comparison of f 0 parameters in speech intervals and lengthened vowels can not be attributed to the variable "task" given that the measurements were extracted from the same recordings, they can be potentially assigned to differences in the speech material under assessment. Overall, the results suggest that not all the acoustic complexity present in speech regarding f 0 is reflected in the production of lengthened vowels as observed in the present study.…”

Multiparametric analysis of acoustic-phonetic measures in genetically and non-genetically related speakers

“…In this regard, different studies within the clinical voice domain (i.e., vocology studies) support the observation that different acoustic outcomes regarding 𝑓 0 may be obtained depending on the task and consequently on the nature of the material under assessment (e.g., comparisons of sentences and sustained vowels), suggesting that for a more reliable assessment of the parameter, material collected in more than one task have to be considered (ZRAICK; SKAGGS; MONTAGUE, 2000;MOON et al, 2012;VIEGAS et al, 2019;SOTOME et al, 2021). Although the differences observed in the present study on account of the comparison of 𝑓 0 parameters in speech intervals and lengthened vowels can not be attributed to the variable "task" given that the measurements were extracted from the same recordings, they can be potentially assigned to differences in the speech material under assessment.…”