In order to make the best decisions for reducing noise transmission through a complex partition, it is necessary to differentiate and determine the relative contribution of the partition elements to the transmitted noise. A “complex partition” is here defined as a partition with multiple elements in the plane perpendicular to the impinging noise, such as various wall materials, doors, windows, etc., as, for example, would make up the façade of a building. A noise source is placed on one side of the composite partition, and the transmitted sound intensity is measured over the surface of the various partition elements. The technique described specifically focuses on determination of building façade transmission loss, using reciprocity with a noise source inside the building. A typical case study is included in the essay.
M. Gendreau, "Solution of noise transmission problems by in situ segregation of composite transmission factors of complex partitions using sound intensity," Proceedings of the 17th International Congress on Sound and Vibration (ICSV17), Cairo, Egypt (18 to 22 July 2009)3094e2eec2d61f3e11d780b19affe6c5