Noisy environments create stress and are the cause of many occupational injuries. It is important to consider the room acoustics so that the function of the room can be fulfilled. Examples of such rooms are auditoriums and meeting rooms as well as open office premises, these often need soundproofing. The goal is also to achieve good speech intelligibility. STI, or STIPA, are some common measures of a room's ability to provide good speech intelligibility. In office landscapes, the attenuation of distances needs to be considered so that noise disturbances between workplaces do not become a problem. In restaurants, optimized room acoustics can contribute to more satisfied guests as the sound environment and the opportunity for conversation are of great importance for the overall experience. Concert halls need the right room sound and a design that enables optimal reproduction of instruments or speakers' sound.