One-third of all hearing loss can be attributed to:
1. Occupational noise exposure.
2. Ototoxic medications.
3. Environmental exposure to toxins.
4. Otitis media.
Occupational noise exposure.
Rationale: One-third of all hearing loss can be attributed to occupational noise exposure. Experiencing occupational noise on an acute or chronic basis can cause bilateral sensorineural hearing loss at high frequencies. Sources of occupational high levels of noise include chain saws and other power tools, jets, diesel locomotives, and lawn mower engines. Ototoxic medications, recurrent otitis media, and environmental exposure to toxins can cause hearing disorders, but they do not account for one-third of all hearing losses.
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