METHOD AND DEVICE FOR ANALYZING AMPLITUDE MODULATED BROADBAND NOISE

摘要

The invention relates to a method for analyzing amplitude modulated broadband noises emitted by bodies, in particular operating noises emitted by propeller driven vehicles, which are transferred as acoustic signals after a pre-processing 11 as input signals to an analysis device 1 wherein they are filtered by means of a band pass 3 according to the settings of the analysis device 1, demodulated by means of a demodulator 5 in respect of their envelopes, released from a DC component by means of a high pass 7 and subjected to a spectral analysis 9. The analysis device 1 generates so-called DEMON spectra, on the basis of which an evaluation of the settings of the analysis device 1 are carried out in an evaluation device 15. The filter settings of the band pass 3 are then changed by means of an adaptive band limit module 17 in dependence on a previously determined evaluation criterion. The invention furthermore relates to a device for carrying out said method.