A method for accurately and effectively diagnosing noise sources and their transmission paths by visualizing acoustic radiation from an arbitrarily shaped object is presented. The noise generated by an arbitrary source may consist of both air- and structure-borne sounds. Usually, it is difficult to distinguish these types of sounds due to a lack of effective methodologies to separate one sound generation mechanism from the other. In most cases, no distinction of sound generation mechanisms is made at all. Oftentimes, in diagnosing noise sources, the spectra of sound pressure and sound power, and radiation pattern are measured. These data, together with the experiences of the engineers who are carrying out these measurements, are utilized to locate the noise sources and identify their causes. This type of approach may not always yield the desired noise abatement because the diagnostic results obtained may not be definitive. In some cases, it may yield wrong diagnostics and result in wastage of resources in the subsequent noise abatement.
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