Auditory FatigueHearing Loss, Noise-InducedMP3-PlayerAuditory ThresholdNoiseAudiometryMusicNoise, OccupationalCochleaVibrationEvoked Potentials, Auditory, Brain StemOtoacoustic Emissions, SpontaneousLoudness PerceptionSensory ThresholdsHearing LossBeluga WhaleHair Cells, Auditory, OuterHearingCochlear DiseasesSound SpectrographyHair Cells, AuditoryAcoustic StimulationHair Cells, Auditory, InnerHearing Loss, SensorineuralAudiometry, Pure-ToneSpiral GanglionEvoked Potentials, AuditoryHearing DisordersGoldfishMice, Inbred CBAGuinea PigsTime FactorsDifferential Threshold