Speech impairment includes both difficulties with language and meaning, and difficulty actually producing intelligible speech. Language and meaning difficulties are covered on the cognitive impairment page.
Speaker independent speech recognition systems often fail to recognize the speech of these users, because they are based on average speakers. Speaker dependent systems may offer improved performance, but rarely have high accuracy, because of the inconsistency of most impaired speech. Speech recognition should not be the only form of input.
Some people with impaired speech also have impaired dexterity.
(Visit the page that is indexed by IVR application)