Obstruent Obstruent An obstruent is a speech sound such as , , or that is formed by "obstructing" airflow. Obstruents contrast with sonorants, which have no such obstruction and so resonate. All obstruents are consonants, but sonorants include both vowels and consonants. Obstruents are subdivided into plosives (oral stops), such as , with complete occlusion of the vocal tract, often followed by a release burst; fricatives, such as , with limited closure, not stopping airflow but making it turbulent; and affricates, which begin with complete occlusion but then release into a fricative-like release, such as . Obstruents are prototypically voiceless, but
Complete Vocal Institute sense, that there is no room for improvement. Research is ongoing and techniques are updated regularly. The goal of Complete Vocal Institute is to explain the voice in a simple and understandable manner and ensure that the desired sounds are produced in a healthy way so that the singers avoid damage to their voice. Singers with a professional or semi-professional background can apply for admission to a number of courses of varying length and content. Singers can choose to follow the courses in Copenhagen or in a number of countries, where there are authorized CVT teachers. The shortest courses are