抄録
Psychological responses and permissible limits of 20 subjects under intermittent rattling noise of a fitting were measured. A subject sits in front of the fitting with glass plates and answers questionnaires for psychological state in/after exposure of intermittent rattling noise from the fitting exposed to low frequency noise. The fitting rattles 10s cyclically with silent time. The values of "loud", "can't tolerant as living room" and "can't tolerant as bed room" increase as a duty factor of rattle time in a cycle time increases. Permissible limits were measured by L_<Aeq 5s> of rattling noise adjusted by subjects themselves. The permissible limit decreases according to duty factor. A calculated L_<Aeq> from L_<Aeq 5s> is almost constant regardless of duty factor.
