[The NSI (Noise Sensitivity Index)--a method for the demonstration of acute physical symptoms in noise exposure and combination exposure].

The NSI (Noise Sensitive Index) is a method suitable for the single or repeated recording of acute, subjectively perceived bodily complaints caused by exposure against noise alone or combined with additional physical factors (e.g. physical load, high temperature) during the lapse of exposure. The paper describes the application of NSI in 6 experimental investigations. The results are indicative regarding their dependence on components of exposure and personality. If certain rules are taken into consideration, application, scoring and interpretation of NSI is easy, not very time consuming, and profitable.