title: Noise research is hampered.
authors: Manfred
authors: M
authors: Spreng
mesh_terms: D015340:Epidemiologic Research Design; D019317:Evidence-Based Medicine; D005858:Germany; D006317:Hearing Loss, Noise-Induced / Q000453:epidemiology* / Q000209:etiology*; D006801:Humans; D009622:Noise / Q000009:adverse effects*; D016273:Occupational Exposure / Q000706:statistics & numerical data*