Sixth European Conference on Speech Communication and Technology

Budapest, Hungary
September 5-9, 1999

Vowel Production in Aphasia

Tatjana Prizl-Jakovac

Department of Speech Pathology Faculty of Special Education and Rehabilitation University of Zagreb, Croatia

This study explored a voice characteristics in aphasic patients suffering from the damage of the left and right cerebral hemispheres regardless of the aphasia type. A series of acoustic analyses were conducted including fundamental frequency in Hz (Fo), duration of the vowel "a" phonation, jitter and shimmer. A pattern of 20 male aphasic patients was included in the research. At the aphasics with the damage of the right cerebral hemisphere means show higher value of the basic laryngeal tone (Fo) but shorter fonation. Respondents with aphasia caused by a left hemisphere damage achieved better scores on variable duration of the vowel "a". It seems that disorder in aphasics with right lesion primarily reflects an inability to implement particular types of articulatory gestures or articulatory parameters rather than an inability to implement particular vowel.

Full Paper (PDF)   Gnu-Zipped Postscript

Spectrogram 1. Characteristical voice pattern of left brain damaged subjects (discontinued voice) [GIF image]
Spectrogram 2. Characteristical voice pattern of right brain damaged subjects (continued voice)

Bibliographic reference.  Prizl-Jakovac, Tatjana (1999): "Vowel production in aphasia", In EUROSPEECH'99, 583-586.