Visualisation and analysis of noise sources of a gear unit

In technical acoustics, noise source visualization is an important tool. There are many different techniques of noise source visualization, most of which have been developed, bearing a specific noise source in specific type of acoustic environment in mind. Consequently, an individual visualization method is restricted to certain types of noise sources in a specific acoustic environment and in a limited frequency area. This article presents a new visualization method of complex noise sources using an acoustic camera. In this respect, a new algorithm is used, enabling visualization of all types of different complex noise sources. Monopole, dipole or quadruple noise sources can be observed simultaneously. A moving noise source can be tracked by means of an acoustic camera. In addition to that, various transient acoustical phenomena can be noted. On the basis of this, advanced determination of the condition of mechanical systems by means of noise is possible.