Revisiting the speaker discriminatory power of vowel formant frequencies

The data comprises of vowel formant and vowel duration values for two speaking styles: Dialogue and Interview.Acoustic-phonetic parameters:<br>• F1: the first formant frequency in Hertz measured at oral vowels mid-points;<br>• F2: the second formant frequency in Hertz measured at oral vowels mid-points;<br>• F3: the third formant frequency in Hertz measured at oral vowels mid-points;<br>• F4: the fourth formant frequency in Hertz measured at oral vowels mid-points;<br>• Vowel duration: defined as the duration of oral monophthongs including the seven phonemic vowels<br>of Brazilian PortugueseThe participants are 20 subjects, all male, Brazilian Portuguese (BP) speakers from the same dialectal area (state of Alagoas). Each speaker is coded with a letter and a different letter number, e.g., A1, A2, B1, B2, C1, C2.The "Random" column was employed to arrange the data order randomly during tests.