1. ABBOTT , P. E. , and
WOODBURY , J. R. , 1965 , Joint Army-Navy instrumentation research investigation of auditory displays . Douglas Aircraft Co. Report LB 32125 .
2. Auditory Signals for Instrument Flying
3. The Stability of a Standard of Loudness as Measured by Compensatory Tracking
4. HUMPHREY , C. E. , and
THOMPSON , J. E. , 1952-3 , Auditory display II. Comparison of auditory and visual tracking in one dimension . Three reports. Refs. APL/JHU-TG-14G, 147, 148 .