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ear defenders
- Sinônimos
- acoustic ear muffs
- ear protector
- Definição1
- Any device, such as an earplug or an earmuff, used to protect the human ear from loud noises, like that of jet engines, that may damage hearing. Combined earplugs and earmuffs provide the maximum ear protection. Another combination of helmet and neoprene earplugs is equally effective.
- Fonte1
- KUMAR, Bharat (ed.). An illustrated dictionary of aviation. New York: McGraw-Hill, c2005. 752 p.
- Fonte2
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Circular 229: proceedings of the ICAO human factors seminar. Montreal, 1990. (Cir. 229-AN/137)
- Contexto
- In industry a SPL of 85 dBA is generally considered to be the upper limit of acceptable ambient noise, and all personnel should wear ear defenders whenever working in an environment where the ambient noise is in excess of 85 dBA. Final conclusions about what is to be considered as a safe noise level can only emerge from the study of regular audiograms of flight crew & controls over a long period.
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- protetores de ouvido
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