this post was submitted on 11 Aug 2023
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Rubbish. With around 75-80 dB at 25 meters, high speed trains at 300 kph are about as loud as 6 lane highways, and unlike the highway that is for less than 6 seconds to a stationary observer. A V8 formula one car was ear damagingly loud at more than 130 dB.
https://www.static.tu.berlin/fileadmin/www/10002264/ews/2023-sose/2023-05-22_RTRI_Uda_Seminar.pdf
https://www.hitachi.com/rev/archive/2021/r2021_06/06a02/index.html
edit: Here's a German ICE train going 300 kph through a station if anyone wants to get a rough idea of how a modern high speed train sounds relatively up close.