1 explain the syllabic structure in english

8 the types of Obstruction.
There are two types of articulatory obstruction: completeand incomplete. When the obstruction is complete the organs of speech are in contact and the air stream meets a closure in the mouth or nasal cavities as in the production of the English [p, b, t, d, k, g, t∫, ʤ, m, n, ŋ]. In other words, the complete obstruction is formed when two organs of speech come in contact with each other and the air passage is blocked.
In case of incomplete obstruction the active organ of speech moves towards the point of articulation and the air stream goes through the narrowing between them as in the production of the English [f, v, s, z, θ, ð, ∫, ʒ, h, w, l, r, j]. In other words, the incomplete obstruction is formed when the articulating organ is held so close to the point of articulation as to narrow or constrict the air passage without blocking it.
According to the manner of noise production and the type of obstruction the consonants are divided into occlusive and constrictive.
Occlusive consonants are sounds in the production of which the air stream meets a complete obstruction in the mouth. According to the principle of voice or noise prevalence, they are subdivided into noise consonants and sonorants. Noise consonants are divided into plosive consonants and affricates.
In the production of plosive consonants the breath is completely stopped at some point of articulation and then it is released with a slight explosion [p, b, t, d, k, g]. They are also called stops.
In the production of affricates the speech organs form a complete obstruction which is released so slowly that considerable friction occurs at the point of articulation [t∫, ʤ].
Occlusive sonorants are also made with a complete obstruction but the soft palate is lowered and the air stream escapes through the nose, so they are nasal.
Constrictive consonants are produced with an incomplete obstruction, so the air passage is constricted. They are divided into noise consonants or fricatives and sonorants.
In the production of fricatives the speech organs form an incomplete obstruction, so the air escapes through the narrowing with friction [f, v, θ, ð, s, z, ∫, ʒ, h].