Page 45 - DJJ 40173 compile notes - E-BOOK NEW EDIT WITH INDEX_Neat

Human sensory capabilities

1. Sight : Human eyes see differently from different

angles or position. Limit of color vision

2. Noise : noise contribute to feelings such as

irritability, boredom, and well being.
dB effect

90 harmless

3. Touch: touch adds or may even replace the Above unsafe
100
information transmitted to brain by eyes and ears. 130 Unpleasant +

harmful

4. Vibration and motion: guidelines

i. Eliminate vibration (>0.08mm amplitude)

ii. Used shock absorbers (spring)

iii. Damping material/ cushioned seats

iv. Reduce vertical vibration

v. Avoid any seating that transmit vibration 3-4
cycles per second