CD Skripsi
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
used, then the measurement of noise from the motorcycles exhaust was done 2m
from the exhaust. The results of the measurement showed that sound intensity
generated by standard motorcycle exhaust at angle of 90o produced maximum
value of 78,17 dB, 79,62 dB and 97,55 dB for Honda, Suzuki and Yamaha
respectively. By modifiying the exhaust, the noise level produced of Honda,
Suzuki and Yamaha were 97,48 dB, 97,62 dB and 97,55 dB respectively. The
significant increase of noise level for modified exhaust with muffler was caused
by several factors such as muffler and diameter of exhaust. The range value of
noise level for the standard exhaust was measured at the angle of 90o and the
engine variation of 5000 rpm was 78,66 dB while for the modified exhaust
produced an average value of 97,55 dB with the same position and engine
variation.
Tidak tersedia versi lain