ABSTRACT
To determine the sound power which will be radiated by a machine or structure at the design stage remains an elusive goal. However, progress has been and continues to be made. Thus, if the expected forcing function can be determined (for example, by suitable measurements on a model in which the load impedance presented to the source is properly represented), then the sound power that will be radiated by the structure can be determined by available analytical techniques. Such an approach is particularly useful when the effects of modifications to existing structures, for the purpose of noise reduction, are to be investigated. For implementation of these analytical techniques three fundamental steps are necessary.
