Assimilation is a process of alteration of speech sounds as a result of which one of the
sounds becomes fully/partially similar to the adjoining sound.
Types of assimilation:
according to direction: progressive,
according degree of completeness: complete (two adjoining sounds
become alike/merge into one), incomplete(assimilated sound retains
its major articulatory features).
according degree of stability: obligatory (historical), non-obligatory
to the change
of theplace of
[θ,ð] – alveolar sounds become dental when followed by interdental sounds. [t, d, n, l, s, z] + [r] – become
[f,v] – bilabial sounds become labio-dental.
According to the change of the work of vocal cords. Sonorants [m, n, l, r, j, w] are partially devoiced when preceded by voiceless
cons. The suffixes –s depend on the
quality of the preceding cons. The pronunciation of the –ed flexion depends on the last sound of the stem.
According to the change of the lip position. Consonants followed by [w] become lip-rounded.
According to the change of the position of the soft palate nasal cononants [m, n] influence preceding [t,d].
According to the change of the manner of release of plosive consonants: [p, b, t, d, g, k] + [n, m] – nasal plosion e.g.button, [p, b, t, d, g, k] + [l] – lateral plosion e,g, bottle,
[p, b, t, d, g, k] + [p, b, t, d, g, k, tS, dj] – loss of plosion. Loss of
aspiration [s] + [p, t, k].