1984 年 40 巻 6 号 p. 373-380
Relations between points of subjective equality (PSE) and L_<eq> for loudness, annoyance and endurance of road traffic noise exposed during the works were investigated, and effects of vibration on these subjective ratings of road traffic noise were also investigated. Eight male students were adopted as subjects. Road traffic noise(T) were exposed at 5 levels from 60 to 80 dBA, L_<eq>. Vibration was exposed vertically in whole body at 75 dB, VL (energy mean) overlapping road traffic noise at 4 levels from 65 to 80 dBA, L_<eq>(T(V)). Control experiments were also made using pink noise at 7 levels from 50 to 80 dBA, background noise of 42 dBA, L_<eq> and background noise of 58 dBA, L_<eq> in concomitance with vibration (P, B_0, B_1(V)). As a result of experiments, subjective ratings mentioned above had the linear relation with noise levels of T, T(V) and P respectively. Then, PSEs of traffic noise were calculated for these subjective ratings respectively. It was found that PSEs of loudness, annoyance and endurance of traffic noise were lower than L_<eq>. Vibration tended to affect to subjective ratings of road traffic noise in the lower levels. Further, present data were compared with those of experiments and community responses of other researchers.