From experience, rocking out hurts the ears. We all know it’s right to think that loud music isn’t necessarily good music. Likewise good music is not necessarily loud. That goes for classical music, too.
And that’s where the EU comes in, setting officially unacceptable — meaning illegal — decibel levels for the health and safety of workers. Factory workers. Flautists. Y’know, workers. The IHT has all the gory detail here.