Experimental Superposition of Acoustic Fields for Detection Performance Studies.

The concept of superimposing a target acoustic field onto an independent noise acoustic field is discussed and sample results are presented using data from the deep Atlantic Ocean. The purpose is to explore the principles and methods of how this concept can be implemented for assessing signal detection in the presence of noise as applied to particular systems. The target signal was composed of high and low level components which were used simultaneously. From these data, the high level signal was scaled down in amplitude and reinserted into the noise spectrum. The detection results of the actual low level signal and the reconstructed low level signal are compared and the results are shown to be essentially the same. Author