14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

Perception of Vowel Quantity in Dysarthric Speech - Interaction of Acoustic, Articulatory and Perceptive Timing Mechanisms

Gabriele Scharf

Edith-Stein-Rehabilitation Clinic, Bad Bergzabern, Germany

It is the purpose of the present study to investigate the influence of different acoustic and articulatory timing mechanisms in dysarthric speech on the perceivability of the phonological vowel quantity contrast in German. Sentence utterances of patients with dysarthria due to cerebellar atrophy and Parkinson's disease were auditively judged as well as analyzed on the acoustic and articulatory level. Data analysis indicated an interaction of articulatory timing (positioning of vowel onset in the labial opening gesture), acoustic timing (vowel duration and speech rate) and perceptual ratings of vowel quantity. The results suggested that different perceptive strategies were applied dependent on the type of dysarthria. Investigation of the interrelation between segmental and suprasegmental speech timing in dysarthria on the one hand and auditive perception performance on the other hand might shed light on general mechanisms in the perception of segmental contrasts.

Full Paper

Bibliographic reference.  Scharf, Gabriele (1999): "Perception of vowel quantity in dysarthric speech - interaction of acoustic, articulatory and perceptive timing mechanisms", In ICPhS-14, 1797-1800.