<unk>  is a tendency to speak rapidly and frenziedly, as if motivated by an urgency not apparent to the listener.  The speech produced, sometimes called<unk> d speech, is difficult to interrupt and may be too fast or too tangential for the listener to understand--it is an example of cluttered speech.  It is a hallmark of mania and is often seen in bipolar patients during manic periods.  People with schizophrenia, as well as anyone experiencing extreme anxiety, may also exhibit<unk> .<unk>  usually refers to the improperly verbalized speech which is a feature of hypomanic and manic illness.
Cluttering is a speech disorder that is related to<unk>  in that the speech of a clutterer sounds improperly verbalized, but cluttering is a distinct language disorder, whereas<unk>  is a symptom of mania, anxiety, or schizophrenia.  Even though cluttering sounds almost identical to<unk> , it differs in that<unk>  is rooted in anxiety, where cluttering is not.<unk>  is an instance of tachylalia, which is a term for rapid speech.<unk>  is also variously related to agitolalia, agitophasia, tachyphasia, and verbomania.
Pressure of speech
Vocal resonation
Trench mouth
Excessive tearing
Acoustic reflex
Cramp
Multilingual support 
Speech communication