Findings are consistent with the atypicality of VOT and F2 reported for English-speaking PWS. PWS had atypical VOT durations and F2 values. duration whereas voiced-geminate stops showed voicing for only 3040 per. Results showed that stuttering was significantly affected by emphatic consonants. status frame by frame from the beginning of stop closure until stop release. The positive and negative VOT durations of/t/vs./tˁ/and/d/vs./dˁ/and F2 onset frequency were measured acoustically. Data were analyzed by Repeated Measures ANOVAs. They read and memorized four monosyllabic plain-emphatic words silently. Ten adolescent PWS and 10 adolescent FPs participated in the study. Preaspiration duration was measured as the duration from the offset of modal voice in the vowel to the onset of the stop closure. This results in a period of preaspiration, examples of which can be observed in the spectrograms in (4), (5) and (7). The hypotheses were that PWS should differ from fluent persons (FP) in VOT duration and F2 onset frequency as a result of the transition deficit for environments with complex phonetic features such as Arabic emphatics. Swedish, voice offset tends to be initiated before the stop closure is made (cf. Using this framework, the current study examined the acoustic productions of two fine-grained phonetic features: voice onset time (VOT) and second formant (F2). Neuromuscular models of stuttering consider that making transitions between phones results in inappropriate temporal arrangements of articulators in people who stutter (PWS).

Onset stop closure durations