title: Changes in TTS associated with humming and nonvocal activities.
mesh_terms: D000293:Adolescent; D000328:Adult; D001309:Auditory Threshold; D004432:Ear, Middle / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction; D012119:Respiration; D013997:Time Factors; D014831:Voice