Ear Protection Provided by Several Standard Air Force Devices

摘要

Sound attenuation achieved with several routinely procured standard Air Force devices was determined with 10 subjects. Devices and their combinations studied were: earplugs, earmuffs, earplugs and earmuffs, communication-type headset-microphone, and headset-microphone with 'dry cotton' in the ear canals. Results indicate that occasionally a need may exist to measure the protection an individual is getting with ear-protective devices. Also, results with the earmuffs were somewhat different from results found at another facility. Attenuation resulting from 'dry cotton' and a headset-microphone in combination suggests the need to investigate speech intelligibility with that condition. (Author)