AcousticsNoiseSpeech AcousticsNoise, OccupationalSound SpectrographyVoice QualityPhonationSoundSpeech IntelligibilityVocal CordsPsychoacousticsVocalization, AnimalSpeech Production MeasurementSpeech PerceptionVoiceAcoustic StimulationUltrasonicsHearing Loss, Noise-InducedCuesSignal-To-Noise RatioTime FactorsEar Protective DevicesAuditory ThresholdAircraftPerceptual MaskingArtifactsStochastic ProcessesRailroadsAudiometryAlgorithmsAudiometry, Pure-ToneAuditory PerceptionSignal Detection, Psychological