MusicMusic TherapyMP3-PlayerAuditory PerceptionPitch PerceptionDancingPitch DiscriminationAcoustic StimulationAptitudePleasureAuditory Perceptual DisordersEmotionsHearing Loss, Noise-InducedArtRelaxationSound SpectrographyCochlear ImplantsTreatment OutcomeQuestionnairesTime FactorsNoiseRetrospective Studies