Open AccessComplex geometry automotive muffler sound transmission loss measurement by experimental method and 1D simulation correlation
Author(s) -
Mahadhir Mohammad,
Mohd Farid Muhamad Said,
Muhammad Hariz Khairuddin,
M. K. A. Kadir,
M. A. A. Dahlan,
Thiha Zaw
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/884/1/012098
Subject(s) - muffler , acoustics , microphone , transmission loss , measure (data warehouse) , electrical impedance , expansion chamber , sound transmission class , noise (video) , acoustic impedance , computer science , engineering , physics , mechanical engineering , electrical engineering , sound pressure , database , artificial intelligence , image (mathematics)
A muffler is a device to attenuate noise from the exhaust. The muffler performance determined by the acoustic performance is called sound transmission loss (STL). This paper aims to measure the STL experimentally and correlated with the 1D simulation result. STL was measured using the impedance tube. Four-pole method (microphone) and two-load method were applied to measure the STL. The STL was also determined through the 1D simulation tools software. Three types of mufflers STL were measured; small expansion chamber, big expansion chamber and complex muffler. The respective error between simulation and experiment were 0.17%, 7.89%, and 11.40%. Hence, the STL experiment result was well correlated with the 1D simulation model.