- All main occupied spaces should be assessed.
- If the building has one or more bedrooms, the lowest scoring bedroom determines the overall score for the inside system and outside noise criteria. In that case, it supersedes the weighting of different rooms.
- Rather than assessing the minimum sound-insulating value of outer wall constructions, the resulting maximum indoor sound level is assessed. This way, the construction can be optimised for different locations with different external sound levels, with buildings on quiet locations needing fewer measures than buildings on sound heavy locations, while still scoring the same.
- The levels are aimed at setting ambitions for calculations at the design stage. After completion, when questions arise whether the ambitions are achieved, measurements can be done. These can be done by a professional, but also with a noise meter app on a smartphone.
- The limit values are based on ISO 140-4.
Total average score = total weighted score / total hours use
The total average score is based on multiplying the acoustic quality score for each room with the amount of hours spent and the number of people in that room during a week (weekdays and weekend), then dividing by the total number of people-hours. In case no actual or predicted use numbers are available, use the default use hours in the table below. This way, the rooms that are being used more intensively will contribute with higher weight.
