Method for detecting and locating noise emission of object moving in water particularly submarine under water, involves detecting and registering sound waves by two spaced hydrophones, where spatial mapping of noise emission takes place

摘要

The method involves detecting and registering sound waves by two spaced hydrophones (7), where spatial mapping of noise emission takes place on the basis of temporary correlation of the detected sound waves (11). A differentiation takes place between the external and/or the background noise and the object noise in the spatial arrangement and only the sound wave associated with the object noise is evaluated for further analysis. An independent claim is also included for a device for detecting and locating noise emission of an object moving in water, particularly submarine under water.