40 Wistar rats were randomly devided into 2 groups:the noise exposure and the control The noise intensity was 95 dB(A),8 hours per day for 30 days The results showed that in the noise exposure rats there were increase of their wilt or fidgets decrecas of activities,lowering of body weight gain obvious reduction of the learning ability and memory function and decrease of the muscular tolerance It indicated that continued exposure to inten...