Patent ID: 8401823
Filing Date: 2013-03-19
Classification: H04R

Abstract:
1. An arrangement for diagnosing the operating state of a device under test in the presence of ambient noise source and detecting, localizing and classifying defects of said device, characterized in that said arrangement comprises: an excitation means which provides a stimulus u(t) for exciting the device under test, at least two sensors measuring signals p(t,r at least two filters, each having an input which receives a respective one of said measured signals p(t,r a source analyzer having at least two inputs, each of which receives a respective one of the filtered signals p′(t,r a classificator having at least one vector input connected to receive said analyzer defect output and having a classificator output which indicates the quality status of the device under test, wherein said defect vector D(t,r wherein said source analyzer has at least one analyzer noise output providing a noise vector N(t,r said classificator including an ambient noise remover having at least one device input connected with said device vector input and at least one noise input connected with said at least one noise source output, and having at least one output providing a valid defect vector D′(t,r