Cochlear ImplantationCochlear ImplantsElectrodesDeafnessHearing Loss, BilateralElectrodes, ImplantedHearing Loss, SensorineuralHearing LossRound Window, EarSpeech PerceptionAudiometry, Pure-ToneScala TympaniHearing TestsTemporal BoneVestibulocochlear Nerve DiseasesLanguage DevelopmentCorrection of Hearing ImpairmentPersons With Hearing ImpairmentsHearing Loss, CentralCHARGE SyndromeCochleaAuditory ThresholdHearing Loss, UnilateralAudiometry, Evoked ResponseAudiometrySpeechCochlear NerveEvoked Potentials, AuditoryHearingStapes SurgeryHearing AidsEducation of Hearing DisabledSpeech IntelligibilitySpiral GanglionConstitution and BylawsVestibular DiseasesOtologic Surgical ProceduresChloral HydrateAcoustic StimulationLanguage TestsHearing Loss, SuddenTreatment OutcomeOtosclerosisChild LanguageSpeech Discrimination TestsPostoperative PeriodAuditory CortexIon-Selective ElectrodesSound LocalizationEmbryo Implantation, DelayedElectric ImpedanceTinnitusEvoked Potentials, Auditory, Brain StemMeningitis, PneumococcalElectrochemistryTime FactorsAuditory PerceptionVocabularyElectric StimulationHair Cells, AuditoryRetrospective StudiesLens Implantation, IntraocularElectrochemical TechniquesEar, InnerLanguagePacemaker, ArtificialEquipment DesignMicroelectrodesFollow-Up StudiesProsthesis DesignPostoperative ComplicationsParentsProspective StudiesUterusProstheses and ImplantsStentsPregnancyPotentiometryEndometriumPatient Selection