4. Mixed Speed and Volume
Some dysarthria sufferers may speak consistently quickly or slowly, loudly or softly, but others have no consistent pattern to their regular speech. They may say one sentence in a whisper and scream a few words to complete the sentence.
By the same token, they may speak the first part of the sentence so quickly one can’t even catch a word and the rest of the thought may be said so slowly it is hard to catch what is being said. Usually, a dysarthria sufferer tends toward one speed or volume rather than another.
Most are either loud or soft, fast or slow, but many vary between extremes without reaching the middle. It can be more difficult to use speech therapy to help treat those who do not show a consistent pattern. The reason for the irregularity is that the brain loses its ability to regulate speed and volume or detect such changes.