Abstract
One of the most well-known treatment techniques to improve speech intelligibility of speakers with dysarthria involves the reduction of speaking rate (Duffy, 1995). The theory of this strategy is that a slower rate provides more time to attain articulatory targets. However, the underlying mechanism of enhanced speech intelligibility at slow speaking rate is not yet clear. In other words, it has not been directly examined whether this strategy causes measurable articulatory improvements or simply provides listeners with greater time to process impaired speech. This is an important question especially in clinical practice, related to establishing a treatment target, and furthermore, an overall treatment plan for the client. In this presentation, we will report some articulatory and acoustic indices of articulatory characteristics of speakers with Parkinson’s Disease and healthy controls, producing the same utterances at three different speaking rates. [Work supported by internal funds from LSU.]
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