Penentuan Tingkat Kebisingan Sepeda Motor Knalpot Standar Dan Modifikasi

The noise level produced by standard and modified motorcycles exhaust has been investigated. In this research, there were three types of motorcycles used namely Honda, Suzuki and Yamaha. Noise levels that generated by those motorcycles were measured using Sound Level Meter (SLM) SL 4112. In order to eliminate noise from other sources 5 different angles (0o, 45o, 90o, 135o, and 180o) were u…