Locating signal sources under suppression of noise

Method for locating signal sources under utilization of several, spacially separated sensors which are responsive to signals from said sources and produce output signals to be related to each other in accordance with the principle of cross power density, for acquiring information on the direction of such signal sources, comprising the steps of:

• first, acquiring, as a preparatory step, and through the plurality of sensors, transit time differences resulting from oblique angles of incidence of noise signals originating from a parasitic noise source other than a signal source to be located;
• establishing a normalizing, noise suppressing signal under consideration of transit time differences and amplitude differences for particular sensors;
• second, acquiring signals by means of said sensors, said latter signals include as components, noise signals from the parasitic source and signals from said signal source;
• and
• subsequently subtracting said normalizing signal from an unnormalized signal, respectively being the signals as acquired by the second acquiring to thereby eliminate from the second acquired signal component signals originating in parasitic noise sources.