1. Project no. 5 -- Crew fatigue research. Project no. 5-8 Estimation of the practical significance of tank noise : subject: effect of exposure to tank noise upon hearing acuity of tank crews Author(s): Hatch, Theodore F., authorWalpole, Robert H., author Publication: Fort Knox, Kentucky : Armored Medical Research Laboratory, January 20, 1943 Subject(s): Noise -- adverse effectsMilitary PersonnelUnited States