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This article and the foregoing companion article 1 are concerned with the experimental analysis of machinery noise control problems. Although the general approach, in terms of a source transmission path receiver scheme, is well-known, this is not the case with the manner in which source modelling is handled. The noise control problems of interest here, are dealing with a multitude of simultaneous sources or with a single noise source like a machine, with a multitude of partial sources and 'parallel' transmission paths. The analysis models which are considered are limited to systems with supposedly linear behaviour, i.e. to systems for which output responses may be modelled as a linear superposition of all contributions of the partial sources and transmission paths. Then in loose mathematical terms, for example, the following model equation applies: m partial sources:

Inverse and Reciprocity Methods for Machinery Noise Source Characterization and Sound Path Quantification Part 2: Transmission Paths