Effect of tone on directional orientation during stepping in place with eyes closed.
To examine the effect of a tone on directional orientation during stepping in place with eyes closed 10 healthy adults ages 20 to 27 years stepped in place for 120 seconds with eyes closed in 3 conditions: without a tone, with 1000-Hz pure tone, and with white noise. To examine how the subject rotated in stepping, both range and dispersion of the head's angular displacement were measured by a compass sensitive to terrestrial magnetism. Analysis showed that white noise was effective for directional orientation during stepping. Also, in the pure-tone condition, angular displacement of the head was similar to that in the no-tone condition. This result may have been due to the fact that the stationary wave created by the interference wave made sound normalization impossible.
Okuzumi
H
H
Faculty of Education, Tohoku University, Sendai, Japan.
Tanaka
A
A
Haishi
K
K
Sasaki
T
T
D000328:Adult; D001288:Attention; D005260:Female; D006801:Humans; D008124:Locomotion; D008297:Male; D009949:Orientation; D010898:Pitch Perception; D011571:Psychoacoustics; D012683:Sensory Deprivation; D013017:Sound Localization; D014796:Visual Perception