Electric Stimulation TherapyElectric StimulationTreatment OutcomeCochlear ImplantsChiropteraCochlear NerveVisual ProsthesisAcoustic StimulationAuditory PathwaysElectric OrganCochlear ImplantationAuditory CortexDeafnessInferior ColliculiPitch PerceptionAuditory ThresholdHearingElectrodes, ImplantedPsychoacousticsNeuronal PlasticityCochleaAction PotentialsSpeech PerceptionElectrodesCatsTime FactorsElectromagnetic FieldsElectrophysiologyNeuronsRabbitsGymnotiformes