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D. Cotoros et al.
Ax
Ay
-0.052
-0.048
-0.044
-0.040
-0.036
-0.032
-0.028
-0.024
-0.020
-0.016
-0.012
-0.040
-0.036
-0.032
-0.028
-0.024
-0.020
-0.016
-0.012
-0.008
-0.004
0
Ax vs Ay [m]
Fig. 6 Stability area for sawtooth sound wave coming from the side
Ax
Ay
-0.07
-0.06
-0.05
-0.04
-0.03
-0.02
-0.01
0
0.01
0.02
0.03
-0.11
-0.10
-0.09
-0.08
-0.07
-0.06
-0.05
-0.04
-0.03
-0.02
-0.01
Ax vs Ay [m]
Fig. 7 Stability area for sawtooth wave coming from behind
Time (seconds)
0
5
10
15
20
25
30
580
590
600
610
620
630
640
650
660
670
680
Fz [N]
Fig. 8 Variation of reaction force Fz for sawtooth sound wave
The loss of balance takes places according to Fig. 7 in antero-posterior plane
showing that the subject is strongly affected by the sound. There is also a significant sway on lateral direction proving that the stress was very powerful and totally
imbalanced the subject.