THE EFFECTS OF VIBRATION ON DIAL READING PERFORMANCE.
Abstract
Four experiments were performed to determine the effects of whole-body sinusoidal vibrations in the X, Y and Z axes upon dial reading performance. The subjects were in the semisupine position so that the force of gravity was directed through the X axis of the body. In all four experiments, performance at 6, 11 and 15 cps was compared at various levels of acceleration and with and without the use of a helmet restraint. Further, performance was assessed with an easy and a difficult dial reading task. The results indicated that performance with the easy task was relatively unaffected by the vibration conditions while large and significant losses in performance occurred with the difficult task. Mean errors for the difficult dial reading task increased significantly as acceleration level of vibration increased. The results further indicated that the effects of helmet restraint and frequency upon performance with the difficult reading task varied with the direction of vibration. That is, the use of a protective device to restrict helmet movements: (a) improved performance at all frequencies when vibration was in the X axis; (b) improved performance at 6 cps, but degraded performance at 11 and 15 cps in the Y axis, and (c) had no effect when vibration was in the Z axis. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1964
- Accession Number
- AD0603963
Entities
People
- Harvey A. Taub
Organizations
- Calspan