PURPOSE: To investigate the hypothesis that vowel production is more variable in adults with acquired apraxia of speech (AOS) relative to healthy individuals with unimpaired speech. Vowel formant frequency measures were selected as the specific target of focus. METHOD: Seven adults with AOS and aphasia produced 15 repetitions of 6 American English vowels in /hVC/ context (hid, head, hat, hot, hub, hoot). Vowel formant frequency measures (F1, F2) were Bark transformed and compared with data from archival sources. RESULTS: Measures of vowel acoustics in speakers with AOS did not differ from those of unimpaired speakers, including absolute Bark formant values, vowel space area, intervowel distance, and individual trial-to-trial formant variability. CONCLUSION: Comparison with normative acoustic measures suggested that vowel production at the word level is unimpaired in the current speakers with AOS, supporting previous studies that have shown vowel production is relatively intact in AOS.
PURPOSE: To investigate the hypothesis that vowel production is more variable in adults with acquired apraxia of speech (AOS) relative to healthy individuals with unimpaired speech. Vowel formant frequency measures were selected as the specific target of focus. METHOD: Seven adults with AOS and aphasia produced 15 repetitions of 6 American English vowels in /hVC/ context (hid, head, hat, hot, hub, hoot). Vowel formant frequency measures (F1, F2) were Bark transformed and compared with data from archival sources. RESULTS: Measures of vowel acoustics in speakers with AOS did not differ from those of unimpaired speakers, including absolute Bark formant values, vowel space area, intervowel distance, and individual trial-to-trial formant variability. CONCLUSION: Comparison with normative acoustic measures suggested that vowel production at the word level is unimpaired in the current speakers with AOS, supporting previous studies that have shown vowel production is relatively intact in AOS.
Authors: Alexandra Basilakos; Grigori Yourganov; Dirk-Bart den Ouden; Daniel Fogerty; Chris Rorden; Lynda Feenaughty; Julius Fridriksson Journal: J Speech Lang Hear Res Date: 2017-12-20 Impact factor: 2.297
Authors: Kristen M Allison; Claire Cordella; Jenya Iuzzini-Seigel; Jordan R Green Journal: J Speech Lang Hear Res Date: 2020-08-12 Impact factor: 2.297
Authors: Rene L Utianski; Peter R Martin; Holly Hanley; Joseph R Duffy; Hugo Botha; Heather M Clark; Jennifer L Whitwell; Keith A Josephs Journal: J Speech Lang Hear Res Date: 2021-01-21 Impact factor: 2.297