The purpose of this project is to help EPA to control vehicle noise. There are three major parts: (1) Grant certification, product conformity, statistic of vehicle noise. (2) Study of vehicle noise test; authority correlation test and global harmonization of regulation of vehicle noise control. (3) Revising vehicle noise control laws; propose the draft of these laws related to Noise Control Rule. In this year, granted 687 certifications of vehicle types, 86 product discontinuity and performing 309 vehicles of product conformity. There are total 31 unconformities in vehicle noise control type approval and conformity test. The second item includes: (1)The study of noise test of vehicle in used; (2) Surveying the noise control status of the counties in Taiwan; (3) Correlation test of laboratory of vehicle noise test; (4) The study of harmonization of vehicle noise control regulation. Correlation test of this year (2003), there is one laboratory unconformity in motorcycle stationary noise test. ARTC suggest the lab unconformity to increase the distance from motorcycle to wall. The result improve that the laboratory unconformity is induced by the reflection of sound wave from wall. Harmonization of regulation of vehicle noise control is following up the GRB of WP29. ECE R51-03 draft will be the next regulation of vehicle noise control. The major changes of R51 are: (1) it concerns on the acceleration of test vehicle, (2) vehicle mass, (3) constant speed noise test for M1 and N1 categories, and (4) limits change. The third item is about revising vehicle noise control laws. After working with EPA, following the procedure of law making, the “Law of Granting, Withdrawing and Production Conformity with Noise Type Approval Certification” and “Law of Inspection and Procedure of Vehicle Noise Test” are come in force on 5 November 2003.

Vehicle noise type approval,noise control criteria