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Intelligibility Test of Communication Ear Defenders in an Area of Extremely High Intensity Noise

Many ear defenders, originally designed for protective purposes only, have been used as communication headsets by the installation of acoustic apparatus. Six defender communication headsets in common use and one semi-insert device were tested for intelligibility in a noise environment created by a jet engine. Trained listeners copied prerecorded phonetically balanced (PB) word lists. This paper details the training and testing procedures, including the monitoring of the noise environment. Results are given showing the relative performance of each of the defender headsets.

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JAES Volume 11 Issue 1 pp. 41-44; January 1963
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