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International Journal of Interdisciplinary Research

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Table 1 Trim characteristics (%Y and chromaticity coordinates at illumination D65 and 45/0 geometry with 2° standard observer and a black underlay) and conspicuity measures (person detection distance, peripheral person detection angle, and peripheral color recognition angle) of trims 1–8 (study 1) and trims 1–10 (study 2)

From: Firefighter daytime visibility: trim properties and conspicuity

Trim %Y x y Person detection distance in meters (study 1) Peripheral person detection in degrees (study 2) Peripheral color recognition in degrees (study 2)
1: Solid fl. lime yellow 1a 119.26 .3959 .5445 303.51 (63.93) 25.70 (7.37) 15.00 (7.44)
2: Solid fl. orange-reda 54.16 .6085 .3487 263.87 (59.28) 25.75 (6.96) 10.25 (4.90)
3: Segmented fl. lime yellowa 88.79 .3942 .5259 301.18 (60.59) 24.27 (7.22) 11.25 (6.71)
4: Segmented fl. orange-reda 52.16 .5560 .3723 273.66 (58.57) 25.35 (8.03) 10.40 (6.03)
5: Solid fl. lime yellow 2a 79.71 .4020 .5618 286.57 (71.12) 26.06 (8.57) 14.91 (7.22)
6: Solid fl. lime yellow, filter 1a 104.29 .4062 .5472 286.85 (69.49) 24.50 (7.20) 12.18 (5.73)
7: Solid fl. lime yellow, filter 2 65.3 .3998 .5439 268.85 (134.14) 24.67 (7.57) 10.03 (6.12)
8: Blank 25.25 .3863 .3788 238.15 (54.49) 24.85 (7.47) 8.28 (5.20)
9: Solid fl. lime yellow, filter 3 30 .3942 .5469   24.81 (6.86) 5.24 (4.17)
10: Solid fl. lime yellow, dirty 58 .3923 .5223 24.32 (7.11) 9.67 (5.21)
  1. Standard deviations are indicated in parentheses
  2. aIndicates conformance to NFPA 1971 performance requirements. Filter descriptions for samples 6, 7, and 9 are found in “Study 1 trim stimuli and placement” section paragraph 5 (filters 1 and 2) and 2.2.4 paragraph 1 (filter 3)