Table 5.

Number of subjects who had measurable thresholds by frequency presurgery with at least 20 dB headroom and who still had measurable thresholds at 6 months postsurgery, i.e. not vibrotactile or exceeding the limits of the audiometer

Frequency Hz	125	250	500	750	1000	2000	4000
Pre-op	18	18	15	31	37	28	22
6-months	11	11	10	18	27	23	13