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The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Active Ear Defender Systems: Development Of A Laboratory Model

Report Number: WADC TR 57-368 Volume 2
Author(s): Willard F. Meeker
Corporate Author: Radio Corporation Of America
Laboratory: Aerospace Medical Laboratory
Date of Publication: 1959-12
Pages: 41
Contract: AF 33(616)-3051
Project: 7231
Task: 71786
AD Number: AD0233452

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