| 요약2 |
According to the regulation of exterior noise level for apartment, outdoor noise limited to 65dB(A) among 1st floor and 5th floor. Indoor noise should be lower than 45dB(A) for unit higher than 5th floor, if the exterior noise level exceed 65dB(A). It is very difficult for the apartments under heavy traffic load to satisfy the regulation. And Units under 5th floor will be put under the worse noise condition comparing with units over 6th floor, because they don't need to content with the indoor noise level. Outdoor noise level for indoor for units among 1st and 5th floor is evaluated by arithmetic mean value, so whenever they met the minimum performance standard, some of them could be exposed to the noise level above the criteria. If units lower than 5th floor were designed differently from units higher than 6th floor in the planning step, they can be put over 45dB(A). Therefore the current regulation needs to be improved to be a reasonable level |