Physiological responses at short distances from a parametric speaker

Table 3 The comparisons of the distance between general speaker and parametric speaker

	0.3 m		1.0 m		2.6 m
	parametric SP	general SP	parametric SP	general SP	parametric SP	general SP
∆Sympathetic nerve activity	1.279 ± 0.301	0.631 ± 0.240	1.215 ± 0.338	1.551 ± 0.345	0.527 ± 0.559	1.616 ±0. 484*
∆Parasympathetic nerve activity	-0.108 ± 0.028	-0.072 ± 0.024	-0.087 ± 0.025	-0.087 ± 0.020	-0.037 ± 0.005	-0.152 ± 0.045 +
∆SDPTG	-0.056 ± 0.018	0.027 ± 0.012	0.055 ± 0.013	0.064 ± 0.026	0.834 ± 0.033	0.802 ± 0.026 +
∆α band ratio at Pz	-0.001 ± 0.009	0.002 ± 0.003	0.015 ± 0.004	0.002 ± 0.004	0.040 ± 0.024	0.034 ± 0.083
reaction time	0.496 ± 0.097	0.876 ± 0.082	0.887 ± 0.089	0.939 ± 0.109	0.778 ± 0.044	0.852 ± 0.044 *

ISSN: 1880-6805