Audiograms of cases 1 to 5. Speech discrimination scores (Discrim) are shown in each audiogram; ‘Pass’ indicates >92 per cent. (a) Case 1, pre-operative; (b) case 1, post-operative; (c) case 2, initial audiogram; (d) case 2, follow-up audiogram; (e) case 3; (f) case 4, initial audiogram; (g) case 4, follow-up audiogram; (h) case 5, initial audiogram; (i) case 5, follow-up audiogram.