عنوان مقاله [English]
The present study, in the context of computational linguistics and acoustic phonetics, attempted to determine the acoustic features of glottal stop before the word initial vowels in the Persian language and to answer the question whether this sound is a consonant or is the characteristic of the initial vowel in the Persian? The research test groups consisted of three groups, nonword 1that in which the vowel is located after an consonant except glottal stop, the nonword group 2,that the presence of glottal stop is clear before the vowel, and the third group containing 30 words of Farsi language Which begin with vowels, were recorded by sample members at the studio. Then by The Praat software they were evaluated based on acoustic measures, duration, first formant, intensity and spectral tilt of vowels of each group. The numerical values obtained were analyzed based on mean indices, variance and Scheffe test. Finally, according to the analyzes, the criteria for the existence of the glottal stop consonant in the word group were not verified, so that the complete stop that has the acoustic characteristics of a consonant does not exist before the word initial vowels in the Persian language, therefore, that incomplete obstruction can …. be as the that phonetic process it is added at the beginning of the initial vowel production, and it makes that vowel glottalized.