Abstract
Twenty years have come and gone since noise control regulation was legislated into law in Japan in 1968. On the other hand, however, the number of complaints about noise from construction sites has hardly changed in the last 10 years. In the present paper, we supply calculation chart of much simply and handy techniques which site supervisors, who can employ in estimating and controlling noise in step with the progress of the construction work. The specific features of the proposed method are as follow: 1) A machine noise level table is provided through statistical analysis of measured 47 popular kind machine noise data. 2) Machine noises are classified by high and medium according to thier A-weighted frequency characteristics. 3) Effects of a typical three type sound barrier on the specific frequency characteristics of the machine noise are given. 4) A calculation chart for reflected sound related to the position of reflector is prepared.
