Arrangement and method for detecting, tracking and classification of defects

The invention relates to an arrangement and a method for the metrological determination of characteristics that describe the features, functionality and quality of a system 37th The system 37 is an electrical, mechanical or acoustic device (such as loudspeakers), or a chemical, biological or other technical system, the state thereof is observed. The generator 43 excites the system 37 to vibrate with the period T. The sensors 45 and 47 measure the state of the system 37 and the filters 51, 81, 75 separate the deterministic and random signal component in the measured signals p (t, r The analysis system 65 determines characteristics which allow detection and classification of the error causes (such as a housing leak 39). Through the use of multiple sensors and appropriate signal processing, interference caused by an external noise source 90 can be detected and invalid measurements are avoided. The invention is best characterized by the following illustration.