Introduction There are ten friction consonants in English.For all of them the lung pushes air 3 8 65 through a narrow opening where it causes friction of various kinds.Among them,/f, 0,s,f,h/are voiceless consonants while/V,δ，Z,3,r,I are voiced consonants.◼ Introduction ◼ There are ten friction consonants in English. For all of them the lung pushes air through a narrow opening where it causes friction of various kinds. Among them, /f, θ, s, ʃ, h/ are voiceless consonants while / v, ð, z, ʒ, r, / are voiced consonants