If there is an impact noise of 143 dBA, what hearing protection is required?

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Multiple Choice

If there is an impact noise of 143 dBA, what hearing protection is required?

Explanation:
When dealing with impulsive or impact noise, the goal is to reduce the peak exposure to a safe level. For impulse noise, a common safety limit is around 140 dB peak SPL. A 143 dBA impact is only slightly above that, and a single hearing protection device (either earplugs or earmuffs) typically provides enough attenuation (often around 20–30 dB) to bring the peak well below the 140 dB threshold. So one piece of protection is sufficient for this single impulse. Double protection would add extra attenuation but isn’t required here and is generally used for extremely loud or repeated impulses.

When dealing with impulsive or impact noise, the goal is to reduce the peak exposure to a safe level. For impulse noise, a common safety limit is around 140 dB peak SPL. A 143 dBA impact is only slightly above that, and a single hearing protection device (either earplugs or earmuffs) typically provides enough attenuation (often around 20–30 dB) to bring the peak well below the 140 dB threshold. So one piece of protection is sufficient for this single impulse. Double protection would add extra attenuation but isn’t required here and is generally used for extremely loud or repeated impulses.

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