COMPARATIVE EFFECTS OF AUDITORY AND EXTRA-AUDITORY ACOUSTIC STIMULATION ON HUMAN EQUILIBRIUM AND MOTOR PERFORMANCE.
Final rept. Jul-Dec 68,
AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OHIO
Pagination or Media Count:
Human equilibrium and psychomotor performance of subjects exposed to free-field broadband noise was compared to that for subjects exposed to similar spectra of noise presented through earphones. The major difference between exposures was the extra-auditory acoustic stimulation received by the free-field exposure groups. In the present experiment, the performance of subjects was tested during three different conditions of noise exposure. The noise spectra and levels presented through earphones approximated those delivered to the ear canals of subjects wearing ear protectors in a free-field broadband noise of 140 dB. The types of ear protectors used to create the noise conditions in the preceding experiments and the corresponding intensity levels of the present experiment were earplugs and muffs 100 dB overall SPL in each earphone, earplugs 115 dB overall SPL in each earphone, and earplugs with one earmuff covering only the right ear 115 dB in the left earphone and 100 dB in the right earphone. Author
- Stress Physiology