You must wear insert-type ear plugs and circumaural-type ear muffs when noise exceeds how many dBs?

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Multiple Choice

You must wear insert-type ear plugs and circumaural-type ear muffs when noise exceeds how many dBs?

Double protection is used when the noise is very loud, because combining insert-type ear plugs with circumaural ear muffs gives the highest attenuation by blocking noise through the ear canal and around the ear. When noise levels reach about 104 decibels, wearing both forms of protection helps keep the overall exposure within safe limits during a typical work shift. A single form of protection may not provide enough reduction at this level, whereas much lower levels wouldn’t usually require double protection, and extremely loud levels demand serious protection beyond what one device alone can offer.

Double protection is used when the noise is very loud, because combining insert-type ear plugs with circumaural ear muffs gives the highest attenuation by blocking noise through the ear canal and around the ear. When noise levels reach about 104 decibels, wearing both forms of protection helps keep the overall exposure within safe limits during a typical work shift. A single form of protection may not provide enough reduction at this level, whereas much lower levels wouldn’t usually require double protection, and extremely loud levels demand serious protection beyond what one device alone can offer.

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