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
The 5000 Spirits or the Layers of the Onion incorporating Jairazbhoy, a master sitar player, the band featured a musician who was traditionally taught with the instrument, instead of a western instrumentalist. Williamson also drew inspiration from his time in Morocco, becoming influenced by the song structures and vocal techniques. The album's compositions reflected upon these developments, Williamson's adaption of the Arabian oud to the guitar, and the vocal arabesques being major stylistic points in the album's overall sound. "The 5000 Spirits or the Layers of the Onion" was released in July 1967 on the Elektra label to the UK (catalogue item EUK 257), and the US (catalogue item