| CI | cochlear implant |
| CNS | central nervous system |
| dB | decibel |
| FDA | Federal Drug Administration |
| Hz | Hertz |
| p | probability |
| SD | standard deviation |
| TQ | Tinnitus Questionnaire |
| VAS | visual analog scale |
| WHO | World Health Organization |
| Z | a difference in the median pre- vs. post-test rank score |
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