Jagadhita, P.R. and Akbar, A. 2023. The Effect Of The Addition Of Db Killer On The Noise Of Yamaha Vixion 150cc Racing Motorcycle: Pengaruh Penambahan Db Killer Pada Knalpot Racing Motor Yamaha Vixion 150cc Terhadap Kebisingan. Procedia of Engineering and Life Science. 4, (Jul. 2023). DOI:https://doi.org/10.21070/pels.v4i0.1396.