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Table 2 Changes of Δsympathetic, Δparasympathetic, ΔHR, ΔSBP, ΔDBP and ΔEEG alpha-band ratio

From: Physiological responses at short distances from a parametric speaker

 

speaker condition

distance condition

time condition

 

general

parametric

0.3m

1.0m

task period

recovery period

Δ Sympathetic nerve activity

1.152 ± 0.161

1.326 ± 0.174

1.004 ± 0.150

1.047 ± 0.182

1.162 ± 0.306 *

1.796 ± 0.351

ΔParasympathetic nerve activity

-0.079 ± 0.011

-0.102 ± 0.013

-0.090 ± 0.013

-0.091 ± 0.012

-0.089 ± 0.024 +

-0.113 ± 0.022

ΔHeart rate

-1.047 ± 0.318

-0.770 ± 0.284

-0.454 ± 0.276

-1.363 ± 0.321

-0.719 ± 0.492 **

2.170 ± 0.726 *

ΔSBP

0.389 ± 0.700

-0.602 ± 0.631

1.028 ± 0.673

-1.241 ± 0.645

-0.702 ± 1.226 +

0.500 ± 1.096

ΔDBP

6.176 ± 0.774

6.343 ± 0.971

5.148 ± 0.884

7.370 ± 0.859

6.597 ± 1.397 ***

10.500 ± 0.719 **

Δα brand ratio at Fz

  

-0.008 ± 0.003

-0.002 ± 0.003

-0.003 ± 0.003

-0.007 ± 0.003

0.001 ± 0.006

0.014 ± 0.007

Δα brand ratio at Cz

  

-0.003 ± 0.003

0.006 ± 0.003

-0.002 ± 0.003

0.003 ± 0.003

0.010 ± 0.006

0.008 ± 0.005

Δα brand ratio O1

  

0.007 ± 0.002

0.015 ± 0.004

0.009 ± 0.003

0.014 ± 0.003

0.018 ± 0.007

0.007 ± 0.004

  1. +: P <0.1, *: P <0.05, **: P <0.01, ***: P <0.001.