The purpose of this project is to assist EPA in dealing with the tasks of vehicle noise control and to study vehicle noise control regulations worldwide for regulations revision in R.O.C. There are three major parts: (1) Granting certification, conforming product and statistic of vehicle noise test result, (2) Study the results of noise test of vehicles in use, harmonization of regulation of vehicle noise control and (3) Study the vehicle noise control regulations of different countries and suggest the draft of revision of vehicle noise control regulations. In this project, granted 797 certifications of vehicle types, process of 23 products discontinuity and performed 209 vehicle noise tests for conformity of product. Surveying and support the task of noise control of vehicles in use for every EPB of cities or counties in Taiwan. Conducted roadside check of in use vehicles noise for 15 times with different EPB and test 112 vehicles, 55 vehicles NG. Other achievements and suggestion include: (1) After lowering the limits from 2nd stage to 3rd stage, the averaged noise level, recorded during type approval test. Show a clear trend to be quieter in moving noise, but nor do the stationary noise. One should consider to tight the limit value for stationary noise in order to low down the trend curve. (2) Some EPB member pay many efforts in the road-side noise check this year. Especially the EPB member of Tai-chung county got great achievement, they deserved some promotion. But some EPB members still don’t have enough people nor budget. They need some support to set up the basic capacity. (3) For the COP control, we keep to check the variation between the COP test result and the type approval test result. This will help to improve the quality control of the manufacture.

Noise; Harmonization