Purpose
We developed a serious speech game (smart speech®) for rehabilitation of the patients with dysarthria. The smart speech program is a vocal and articulation training program to aid in speech therapy, vocal training is composed of a three categories such as continuity, pitch, and loudness. The purpose of this study was to examine the usefulness of smart speech programs in speech therapy of patients with dysarthria by evaluating changes in voice and articulation.

Methods
Fifteen patients with dysarthria disorder and without aphasia suffered from brain diseases were enrolled. This study was conducted single case study. The study started with “pre-evaluation 1, and then, evaluations were repeated pre-evaluation 2 after 6 weeks without any treatment in order to generated the control data. After pre-evaluation, a smart speech program was used to perform training. Post-training evaluation 1 were performed just after treatment. And, after six weeks of daily life, conducted a post-training evaluation 2 to see if treatment remained effective. The evaluation used the multi-dimensional voice program of the computerized speech laboratory to collect voice samples?pitch, intensity, fundamental frequency(F?), maximum phonation time(MPT), jitter, relative average perturbation(RAP), F₁, F₂, voice onset time(VOT), and the articulation parameters were measured by the Urimal Test of Articulation and Phonology(U-TAP) and the 3-Position Articulation Test.

Results
The results of comparing the duration of un-treatment with treatment period, pitch range(pitch maximum-pitch minimum), MPT, RAP and U-TAP scores showed significant results(p<0.05). In the post-training evaluation 2, significant changes were retained in pitch range and U-TAP scores, both of which had a long-term effect.

Conclusion
These results suggest that the newly developed serious game for speech training has a positive effects on voice and articulation abilities in the patients of dysarthria. Therefore, it was found that smart speech was effective in improving speech ability and articulation of dysarthria patients.