London has recently completed the ~ 20 billion pound Crossrail project after some 8 years or more of planning and tunneling.
Part of that was creating "vibration free" railway lines that pass some 17m or so directly under world class concert halls and major recording studios.
A small part of some major engineering in a heavily built up constricted environment.
Part of that was creating "vibration free" railway lines that pass some 17m or so directly under world class concert halls and major recording studios.
A small part of some major engineering in a heavily built up constricted environment.
https://www.youtube.com/watch?v=jOu56s6kUj4