Acquired apraxia of speech (OSA) is a motor speech disorder. OSA affects an individual's ability to plan motor movements. People with OSA have difficulty saying what they want to say correctly and coherently. These individuals have difficulty putting sounds and syllables together in the correct order to produce words. OSA occurs most often in adults, although it can affect an individual of any age. The most common etiology of OSA is stroke, also known as cerebrovascular accident (Duffy, 2013). OSA can also result from head/brain trauma, a brain tumor, or another disease affecting the brain. OSA is the result of a cortical and/or subcortical injury/lesion in the left hemisphere of the brain (McNeil, Robin, & Schmidt, 2009). A person with acquired apraxia of speech may also have dysarthria; a motor execution disorder or aphasia; a language disorder, since these disorders often coincide with each other. The main speech characteristics that a person with OSA is likely to possess include: distributed prosody, slow speech rate resulting in elongated sound segments and intersegment durations, and frequent speech sound errors. Articulatory errors made by individuals with OSA consist primarily of distortions, omissions, repetitions, and substitutions (Peach, 2004). Bilabial and lingual-alveolar phoneme errors as well as affricate and fricative errors appear more often than sounds involving other locations and modes of production (Peach, 2004). The phoneme errors that people with OSA have tend to be very inconsistent. Errors do not always occur in the same sounds and the types of errors are not always the same in the same utterance (Peach, 2004). Additional vocal behaviors that commonly occur with AOS include: diff...... middle of paper ......a metronome to assist with the rate of syllable production. The results of this study varied between subjects. While repeated treatment improved articulation, rate and rhythm control treatment had limited benefits for some subjects (Wambaugh, Nessler, Cameron, & Mauszycki, 2012). This approach differs from SPT in several respects. SPT is used to target common production errors in AOS while rate/pace control focuses on increasing speech rate. SPT relies on modeling, rehearsal, placement cues and extensive feedback to achieve correct productions. Control of rate and rhythm relies on instruments such as a metronome or pacing board and provides little feedback on the client's articulatory errors. Based on the results mentioned above, sound production treatment appears to be a more effective therapeutic approach to use with people with OSA..