Abstract
This article can be regarded as an additional step forward in the implementation of the four-transducer wave decomposition method for a random pressure distribution applied to the acoustic analysis of a flow duct element which in this study is a catalytic converted of the type used in automotive exhaust systems. The required signal processing is clearly expounded together with some signal processing improvements that considerably reduce the digitization and computational noise. The practical application illustrated in this paper shows how this technique can be used for laboratory demonstrations in order to measure the acoustic properties of acoustic filters or any other physical discontinuity in a flow duct system. The experimental results could then be used to validate acoustic mathematical models or as a stored function used in the study of a more complex analysis of a flow duct network.
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