Wayside Noise Level Generated by Current Collecting System on Shinkansen and Simulation Analysis
of Time-dependent Fluctuative Level
Takeo MORIKAWA
Comparing the measured time-dependent noise level with the calculated one, power levels of noise
sources on Shinkansen are established. The deduced power levels are used to analyze the contributions
to entire wayside noise level. Afterward, calculated entire noise levels are divided into current
collecting noise and others. The accuracy of each power level is ascertained to be good accordance
between time-dependent calculated noise level and measured one obtained from array-type directive
sound receiver and from non-directive one. Consequently, it is concluded that:
(1) Wayside noise levels by current collecting system on 100 or 300-series-car are lower than overall
noise level by 7 or 3.5 dB(A).
(2) Compared with the noise level of others except for current collecting system, current collecting
one is extremely low for 100 series car. On the other hand, as for 300 series car its level is almost
equal, or a little lower.