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Load Effect on Source Impedance Measurement Accuracy
Technical Paper
2009-01-2041
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The source in an intake/exhaust system is commonly modeled as a source strength and impedance combination. Both the strength and impedance are normally measured and measurement accuracy depends on selecting an appropriate acoustic load combination. An incident wave decomposition method is proposed which is based on acoustic wave decomposition concepts instead of an electric circuit analogy providing a more straightforward approach to investigating the effect of acoustic load selection. Based on studying wave reflections in the system, the uncertainty for determining source impedance is estimated.
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Citation
Liu, J. and Herrin, D., "Load Effect on Source Impedance Measurement Accuracy," SAE Technical Paper 2009-01-2041, 2009, https://doi.org/10.4271/2009-01-2041.Also In
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