Even shop or bank areas are becoming more and more open and larger. For their part, the modern building materials then also contribute to the fact that it is hardly possible to have a confidential conversation any more. Every word, if not actually whispered, can be heard almost throughout the room. In shops, the general noise level is so high that the advertising televisions in the shop have to run without sound so that the customer advisor can still have a somewhat normal consultation. Of course, there is no longer any question of discretion.