An acoustic study of vowel production in Persian aphasic speech

Abstract

Two anterior aphasic patients (one man and one woman) were recorded for their productions of six Persian vowels and were compared to a group of four normal speakers (two men and two women). Praat was used to obtain the spectrograms of the sound files. Vowel duration values showed that normal women produced longer vowels compared to normal men. The male patient produced all vowels shorter, and the female patient produced all vowels longer than all four normal subjects. Although there were no significant differences in the formant frequency values of the four non-round vowels across groups, the two round vowels /o, u/ showed a pattern different from that of other vowels in aphasic speech

Keywords

• aphasia
• vowel production
• acoustic phonetics