Noise, OccupationalHearing Loss, Noise-InducedNoiseNational Institute for Occupational Safety and Health (U.S.)Hearing LossEar Protective DevicesHearing Loss, High-FrequencyAudiometryHearing TestsOccupational ExposureHearingIndustryAudiometry, Pure-ToneHearing AidsAuditory ThresholdRespiratory Protective DevicesOccupational DiseasesHearing Loss, SensorineuralHearing DisordersAir Pollutants, OccupationalOtoacoustic Emissions, SpontaneousMetallurgyEnvironmental MonitoringAccidents, OccupationalHearing Loss, BilateralOccupational HealthPersons With Hearing ImpairmentsCorrection of Hearing ImpairmentHearing Loss, ConductiveEvoked Potentials, Auditory, Brain StemAcoustic StimulationSignal-To-Noise RatioDeafnessInhalation ExposureCochleaHearing Loss, UnilateralSpeech PerceptionCross-Sectional StudiesUnited StatesPerceptual MaskingHearing Loss, SuddenSound SpectrographyPresbycusisOccupational MedicineFiltrationRisk AssessmentRisk FactorsEducation of Hearing DisabledAircraftChemical IndustryCase-Control StudiesAuditory Perception