Effect of noise events on inhabitants' reactions to railway noise

The effect of noise events of railway noise has been found in earlier researches. But this is inconclusive problems. The number effect of ordinary railway noise in Tokyo was examined for sixteen different reactions. Analyses were conducted for individual and grouped data of Likert's scales and highly disturbed responses. Further analsyis was conducted by Hayashi's quantification method 2 and the number effects were obtained from trade-off method. Conventional assumption that reactions are related to the logarithmic number effect of the events is supported with this data, but additive model cannot be rejected. The decibel equivalent number effect (k) ranged widely among different reactions in different methods of analyses. As for annoyance, the number effect was estimated to be equal to or larger than k=20.