SUBJECT INDEX 



533 



and intensity 



simultaneous discrimination, 211 

 glide tones, 210 

 pattern discrimination, 211 

 differences in stimulus complexity, 210 

 effect of frequency 



characteristics of system 

 earphones, 204 

 filters, 204 

 effect of intensity, 204 

 effect of signal expander, 205 

 intensity, 205, 208 

 masking, 223 



methods for improving, 226 

 modulation, 225 

 noise 



pitch differences, 210 

 loudness differences, 210 

 Radio range 

 pitch, 205 

 short pulses, 225 

 simple, 205, 208 

 frequency, 209 

 effect of duration of tone, 210 

 effect of intensity, 209 

 effect of masking noise, 210 

 intensity 

 effect of duration of tone, 208 

 effect of rate of presentation of tones, 209 

 effect of transition between tones, 209 

 visual, 78 

 Display, 201 

 areas 



parts of submarines as, 201 

 auditory, 220 



importance and frequency of use, 162, 173 

 patterning, 163, 173 



functional, 164 

 Radar 



types, 102 

 visual, 77, 201 

 Doppler effect 



in relation to ship motion, 402, 403 

 Drowsiness, 435 



Ear 

 healthy 



sensitivity to noise, 351 

 inflamed 



sensitivity to noise, 351 

 inner 



ampulla, 403 



cochlea, 375 



crista, 403 



cupula, 403, 405, 512 



macula, 403, 404, 405, 408 



oto ith, 403, 404, 407, 408, 412 



saccule, 375, 407 



semi-circular canals, 375, 403, 405, 406, 408, 

 410,411,412 

 endolymph flow, 406 

 in detecting linear acceleration, 405 

 utricle, 375, 403, 404, 405, 408 

 middle 



chronic inflammation, 351 

 Ear defenders, 348, 350 



audibility with, 350 

 Earphones 

 distorting 

 advantages, 205 

 Efficiency 

 equipment arrangement 



determination of function of assemblage 178 

 unit contributions, 179 

 use of charts, 178, 197 

 use of interviews, 178, 197 

 general principles, 177 

 in newly proposed assemblages 187 

 inter-unit links, 181, 189 

 strength, 183 

 types of links, 181, 197 

 lay-out evaluation, 191 

 practical requirements, 190 

 time and motion study, 183, 197 

 types of problems, 177 

 man-machine relation, 153, 177 

 anthropometric data, 153, 159 

 confusion errors, 167, 173 

 control coding, 168 

 display coding, 169 

 localization of controls, 161 

 methods of study, 196 

 motor factors, 153 

 limits of reach, 154 

 movement classification, 166 

 placement of controls, 161 

 perceptual factors, 153 



visual vs. auditory display, 167 

 position of control panel, 160, 173 

 position of controls or displays, 161, 173 

 position of operator, 159, 173 



seating, 159 

 sources of error, 194 

 visual factors, 158 

 work load on body parts, 166, 173 

 Electroencephalogram, 420 

 Emotion, 426 

 Emotional activities 

 compensation for, 419 

 distinguished from homeostasis, 418 

 Emotional stability, 351 

 Endolymph, 403, 404, 407 

 Euler angles, 406 

 Evaporative regulation zone, 286 

 Excitatory state, 407 

 Experimental neuroses, 451 



