In-Situ Transfer Path Analysis of Multiple Vibration Sources in a Complex Source- Receiver Assembly
* Presenting author
Depending on where the source-receiver boundary is defined within an assembly, an airborne sound source can also be considered as a structure borne sound source. For example, if the internal forcing mechanisms within a machine are regarded as the sources, the rest of the assembly including the surrounding air can be considered the receiver. If the structure borne noise resulting from these internal forcing mechanisms can be predicted in real-time, the radiated noise can potentially be predicted and managed- either actively or passively- using numerous approaches. The primary aim of the work presented in the paper is the development of an accurate method for the real-time prediction of structure borne noise, whilst continually monitoring the reliability of these predictions. To facilitate this process, it is necessary to also monitor the stability of the vibro-acoustic frequency response functions that relate the internal forcing mechanisms to the receiver position, and to eliminate the influence of background noise resulting from noise or vibration sources other than those of interest. Presented in the paper are the results of a laboratory transfer path analysis case study of a source-receiver assembly composed of multiple sources attached to a single receiver structure.