files.unigang.comfiles.unigang.com/content/uploads/pic/4/105.pdf · 2.2 2.1.6.4 2.1.6.5 2.1.6.6 221.1 n. 2.2.1.2 2.2.1.3 2.2.1.4 2.22.1 n. 6/12 20/40 (speech discrimination score)