title: Portable media players, preferred listening levels, earphones, and background noise.
authors.forename: Gary
authors.initials: G
authors.lastname: Jacobson
mesh_terms: D001298:Audiology / Q000592:standards*; D006317:Hearing Loss, Noise-Induced / Q000517:prevention & control*; D006801:Humans; D055539:MP3-Player / Q000592:standards*; D009622:Noise / Q000009:adverse effects*