OBJECTIVE: To investigate tone recognition and electrode discrimination in prelingually deafened children with the Nucleus device, and to develop guidelines for customized mapping in the implant users. METHODS: Fourteen prelingually deafened children with cochlear implants participated in this study. Tone recognition was measured with a four-alternative, forced choice procedure from 25 consonant-vowel syllables, each of which had four tonal variations. Electrode discrimination was measured using a same-difference procedure on 7 pairs of electrodes covering the entire electrode array. RESULTS: Tone recognition ranged from 35% to 99% correct with a mean of 62.8% and standard deviation of 14.7% in these users. Electrode discrimination had the mean threshold of 3.4 +/- 0.9, with the best performance from the middle electrodes (E 14 and E 17) at 2.6 and the followed performance at the most apical electrode (E 20). CONCLUSION: The results showed significant individual differences from both tone recognition and electrode discrimination, but there is significant correlation between them.
OBJECTIVE: To investigate tone recognition and electrode discrimination in prelingually deafened children with the Nucleus device, and to develop guidelines for customized mapping in the implant users. METHODS: Fourteen prelingually deafened children with cochlear implants participated in this study. Tone recognition was measured with a four-alternative, forced choice procedure from 25 consonant-vowel syllables, each of which had four tonal variations. Electrode discrimination was measured using a same-difference procedure on 7 pairs of electrodes covering the entire electrode array. RESULTS: Tone recognition ranged from 35% to 99% correct with a mean of 62.8% and standard deviation of 14.7% in these users. Electrode discrimination had the mean threshold of 3.4 +/- 0.9, with the best performance from the middle electrodes (E 14 and E 17) at 2.6 and the followed performance at the most apical electrode (E 20). CONCLUSION: The results showed significant individual differences from both tone recognition and electrode discrimination, but there is significant correlation between them.