Signs and symptoms of dysarthria vary, depending on the underlying cause and the type of dysarthria. They may include: 
Slurred speech
Slow speech
Inability to speak louder than a whisper or speaking too loudly
Rapid speech that is difficult to understand
Nasal, raspy or strained voice
Uneven or abnormal speech rhythm
Uneven speech volume
Monotone speech
Difficulty moving your tongue or facial muscles
