Obstruent voiced obstruents are common. This contrasts with sonorants, which are prototypically voiced and only rarely voiceless. 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
Us or Else: Letter to the System Us or Else: Letter to the System Us or Else: Letter to the System is a compilation album by American hip hop recording artist T.I.. It was independently released on December 16, 2016, by Grand Hustle Records and Roc Nation. The project, which was initially issued as a Tidal exclusive, serves as an extended version of his EP, simply titled "Us or Else" (2016). The project features an array of artists, including Hustle Gang affiliates Quavo, Meek Mill, Ra Ra, Gizzle, Tokyo Jetz, B.o.B, London Jae, Big K.R.I.T., Killer Mike and Charlie Wilson, among others. The projects production was handled