MRCP UK EXAMINATIONS

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NEUROLOGY

SURGERY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The minimum noise level known to cause noise-induced hearing loss, regardless of duration, is ____ to ____ dB.
A
85, 95
B
85, 90
C
80, 90
D
75, 90
Explanation: 

Detailed explanation-1: -Sounds at or below 70 A-weighted decibels (dBA), even after long exposure, are unlikely to cause hearing loss. However, long or repeated exposure to sounds at or above 85 dBA can cause hearing loss.

Detailed explanation-2: -More severe hearing loss can be described according to severity, as follows: Mild hearing loss: Hearing loss of 20 to 40 decibels. Moderate hearing loss: Hearing loss of 41 to 60 decibels. Severe hearing loss: Hearing loss of 61 to 80 decibels. Profound hearing loss or deafness: Hearing loss of more than 81 decibels.

Detailed explanation-3: -The higher the level of sound and longer the duration, the greater the risk of hearing loss. For example, you can safely listen to a sound level of 80dB for up to 40 hours a week. If the sound level is 90dB, the safe listening time reduces to four hours per week.

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