The school nurse is teaching a class of 10th graders about noise-induced hearing loss. Which of the following concepts regarding this type of hearing loss is correct?
A) It results from exposure to noise levels above 150 decibels.
B) The pathological process involved in noise-induced hearing loss is rupture of the ossicles in the middle ear.
C) Noise-induced hearing loss is reversible because specific medications can improve or restore hearing.
D) Loud, low-frequency sound, such as that made by a base guitar, is more damaging than high-frequency sound.
Ans: B
Feedback: The minimum noise level known to cause noise-induced hearing loss is 85 to 90 decibels regardless of duration of exposure to the noise. Exposure to loud noise results in damage to the organ of Corti, located in the inner ear. Noise-induced hearing loss is irreversible. High-frequency sound is more damaging than low frequency sound; however, with prolonged exposure, both can result in hearing loss.
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