A new method is introduced to characterize (segments of) a closed acoustic system. Because it is a full characterization, it is possible to calculate all reflection and transmission effects of a composite system, even if no model is available of the separate segments. A measuring instrument used for this characterization, which is an acoustic network analyzer, is described. The parameterization fit well with systems in which traveling waves propogate. For this reason the method is commonly used by electrical engineers to analyze microwave circuits (used in radar and in satellite links).
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