We have experienced seven cases of cochlear implants (CI), in whom residual hearing was noted in the low to middle frequency region in the better hearing ear. Five out of the 7 subjects used a hearing aid (HA) before the CI, and two subjects did not used HAs because of the poor speech reception. The auditory threshold for pure tone, speech reception score and the discrimination of environmental sounds were evaluated before and after the CI. Although the CI operation was performed on the ear with poor hearing, auditory perception with the CI showed better result than with a HA in all of these tests. The auditory threshold with the CI was around 40 dBHL and was better than with the HA. These recent results confirm the results from other reports which compared the benefits between CI and HA.
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