Determination of Transmission and Insertion Loss for the General Multi-Inlet Multi-Outlet Case

Prior research on assessing multiple inlet and outlet mufflers is limited, and only recently have researchers begun to consider suitable metrics for multiple inlet and outlet mufflers. In this paper, transmission loss and insertion loss are defined for multiple inlet and outlet mufflers using a supe...

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Bibliographic Details
Published in:SAE International Journal of Passenger Cars - Mechanical Systems 2016-04, Vol.9 (1), p.210-215, Article 2016-01-1310
Main Authors: Zhang, Yitian, Herrin, David W, Wu, T, Hua, Xin
Format: Article
Language:English
Subjects:
Internal combustion engines
Mathematical analysis
Methods
Mufflers
Citations: Items that this one cites
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Summary:Prior research on assessing multiple inlet and outlet mufflers is limited, and only recently have researchers begun to consider suitable metrics for multiple inlet and outlet mufflers. In this paper, transmission loss and insertion loss are defined for multiple inlet and outlet mufflers using a superposition method that can be extended to any m-inlet n-outlet muffler. Transmission loss is determined assuming that the sources and terminations are anechoic. On the other hand, insertion loss considers reflections. For both metrics, the amplitude and phase relationship between the sources should be known a priori. This paper explains both metrics, and measurement of transmission and insertion loss are demonstrated for a 2-inlet 2-outlet muffler with good agreement.
ISSN:1946-3995
1946-4002
1946-4002
DOI:10.4271/2016-01-1310