The inverse Patch Transfer Function (iPTF) method developed at the Laboratory of Vibration and Acoustics of INSA Lyon (France) allows reconstructing the acoustic pressure, velocity and intensity fields directly on the surface of an object of complex three-dimensional shape. Based on the concept of virtual volume modeled by finite elements, this method makes it possible to theoretically overcome stationary disturbing sources external to the volume. Finally, the method permits, thanks to a post-processing of the identified fields, to rank the contributions of parts to the radiated acoustic power and to compare with objective metrics (Response Vector Assurance Criterion) experimental measurements to numerical models. As such, this method opens the way to a complete characterization of sources in an industrial context. However, an industrial environment is often very far from a controlled laboratory environment. In particular, the source to be characterized may be maintained by rigid frames which make access to a microphone antenna difficult and it may also be masked by other parts that one does not wish to characterize. This paper shows how the iPTF method can be used when the source is partially masked by an object. The approach is illustrated by numerical experiments and an industrial application.