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Preface 1 Introduction
Light and Seeing
14 other sections not shown
acceleration accuracy Acoustical activities Adapted Aero Medical Laboratory aircraft angle anoxia arrangement articulation index auditory average brightness cent color control devices cranks decibels dials dimensions direction discrimination displays distance Dry-bulb temperature effective temperature equipment errors example exposure fluorescent lamps footcandles footlamberts force frequencies ft-c given glare hearing loss heat height horizontal human engineering humidity illustrates increased indicate individual instruments intensity knob lever light Luckiesh man-machine systems masking measure ment minor scale minutes of arc noise level normal operator optimum panel performance plane pointer positioning movements possible pressure Psychology range ratio reading reference relationship retina scale markers scale units seat sensory shown in Figure shows signals situations sound waves spectrum speech speech interference speed standard stimuli subjects Table target task tests tion tones typically usually variables various vertical visual acuity