Do you mean that it is mandatory to soundproof offices?
Noise measurements are required in certain activities, that explains, for example, the double doors of pubs. Even so, noise is transmitted through the structure of the building so in houses you have to comply with regulations.
The CTE, the building regulations has been in force for about 15 years, requires minimum soundproofing in each house.
So the bathrooms, for example, must have a certain degree of soundproofing, because as in everything, there are degrees. Another places where many sounds pass are the common facilities of the building.
What do I mean? These are the water and heating or ventilation pipes that we all share. It is a box that goes from the garage to the top: a chimney for the sound from top to bottom. If you stay locked up you scream around and someone hears you, it is also used for emergencies.
If you have a bed near this type of facility… you can hear everything, especially at night. If you play a violin at 9 in the morning with the street, the windows open, the TV, the radio… no one will hear you. But you do it at 3 in the morning and he result is the contrary. Not because you make more noise than before, but because it isn’t covered.
It is important that your instrument is not vibrating against a wall. Better in the middle of the room.
The sound vibrates like a lightning next to the wall but if it is in the middle of the room, it first becomes airy, there it loses some volume. Like when you hit a lamppost, which amplifies the blow.
Thank you very much, I’m going to look at the bathroom in a different way.
The houses should be designed so that we do not bother each other. A friend lived in Switzerland in a quiet housing estate. Starting at 8 at night you couldn’t put the washing machine on, there couldn’t be pets, or children … Of course, if it’s a building where all the kitchens are in the same place, not too bad. But in the room next to the kitchen you get noise from the neighbor upstairs and from all sides.
In Spain there is no such culture of noise and I do not say it because of people who turn on the washing machines at night (if electricity is expensive you put it on when you can). It has not been thought that it is more important for people to rest, than to run washing machines during the flat rate at midnight.