Method and device for notching out interference signals

摘要

Due to their sound radiation, operating units generate interference signals in output signals of an underwater sound receiving system located on board. Filtering with respect to frequency also leads to a suppression of useful signals at the blocked frequencies in the output signals. This problem is prevented in the solution according to the invention in that one or a number of pick-ups for structure-borne sound are arranged at the operating units and spectra of the structure-borne sound are derived from their signals. The spectra of the structure-borne sound are used for notching out the lines of the structure-borne sound in the received spectrum of the output signals. This elimination of interference can be particularly advantageously used in passive sonar systems for direction-finding and/or locating water craft.