Combined effect of facial sweating and mounting a night vision device on helmet stability

Fashion and Textiles

International Journal of Interdisciplinary Research

Table 1 Ear-canal temperature and microclimate inside a helmet (Mean ± SD)

Measured outcomes	Condition	A. moving boxes side to side		B. shooting in a prone position
Measured outcomes	Condition	1st phase [No Sweating]	2nd phase [Sweating]	1st phase [No Sweating]	2nd phase [Sweating]
Ear-canal temperature (°C)	BH	35.65 ± 0.43	36.40 ± 0.39^†	35.92 ± 0.52	36.37 ± 0.41^†
Ear-canal temperature (°C)	BH–NVD	35.60 ± 0.56	36.35 ± 0.60^†	35.74 ± 0.58	36.29 ± 0.60^†
Temperature inside a helmet (°C)	BH	25.61 ± 0.65	28.81 ± 1.03^†	26.11 ± 0.54	29.00 ± 0.93^†
Temperature inside a helmet (°C)	BH–NVD	26.30 ± 0.59	29.50 ± 0.48^†	26.95 ± 0.69^*	29.56 ± 0.38^†
Humidity inside a helmet (%RH)	BH	39.9 ± 9.5	77.1 ± 11.8^†	48.4 ± 8.5	84.7 ± 10.1^†
Humidity inside a helmet (%RH)	BH–NVD	42.6 ± 6.2	84.2 ± 3.4^†	53.1 ± 13.4	89.1 ± 8.9^†

BH ballistic helmet, BH-NVD ballistic helmet with a night vision device
^*Significantly different from BH (P < 0.05); ^† Significantly different from the 1st phase (P < 0.05)