I see Austria has joined Switzerland in tamping down vehicle noise. (Not sure about boats and "rap").
Rules include severely limiting motorcycle noise, wherein owners attempting to increase noise can result in fines up to SF10,000. (>$10,000)
Those air-cooled passenger vehicles formerly allowed, must now be quieted beyond original specifications. (VW).
Diesel engines are limited in the number of minutes they remain at idle.
Police maintain "noise-radars" that direct police to noisy violators electronically.
Electric cars, on the other hand, must
provide some noise suggestive of operation.
https://lenews.ch/2025/01/17/switzer...-rules-active/