Investigation of Dynamic Responses and Vibration Serviceability of Temporary Grandstands by a 3 DOF Interaction Model due to Swaying Motion

Table 3

Human perception and comfort category.

Ordinal	Perception category	Subjective response
1	Imperceptible	No response (not uncomfortable)
2	Litter perception	Normal (a little uncomfortable)
3	Clear perception	Accept (fairly uncomfortable)
4	Little strong perception	Litter nervous (uncomfortable)
5	Strong perception	Nervous (very uncomfortable)
6	Very strong vibration	Panic (extreme uncomfortable)