## Maximum noise levels from terminal and industrial plants

Frank Lemstad SINUS

Sigurd Solberg, Kilde Akustikk

Norwegian regulations on maximum noise levels from transport terminals and industrial plants are not (and have not) been well defined. According to practice from 1984, the maximum level is the highest occurring level. The maximum level was considered relevant for the night period only, and the control was to be made from the arithmetic mean of repeated measurements. From 2005, a new comprehensive regulation on most types of external noise has introduced two new definitions of maximum levels. The definitions may yield quite different results and are not assessed for relevance. This gives rise to confusion in legal and nuisance judgments. The presentation includes examples from noise situations in freight train and harbour terminals.