"A train running at 220mph will radiate roughly 1.65 times as much sound power as one traveling at 186mph. At a distance of 50m (~150ft), a TGV train will register a peak of around 92dB in open terrain. The new AGV may be expected to come in at around 94-95dB at that distance and its top speed, though improvements in train aerodynamics may have mitigated the increase."
Many Thanks to All!
3 hours ago