Upspeak is a prevalent speech pattern among the youth that involves ending a sentence with a rising intonation, as if asking a question. Other terms that could be used as synonyms for upspeak include high rising terminal, vocal fry, or valley girl speech. Another similar phenomenon is called vocal fry, which is characterized by a low, creaky, or crackling sound at the end of a sentence. Various descriptors have been used for this phenomenon, including creaky voice, glottal fry, and pulse register. Yet another related phenomenon is called monotone speech, which involves speaking in a steady, uninflected tone without variation in pitch or intonation.