A Survey of Sound Source Localization Methods in Wireless Acoustic Sensor Networks

Figure 9

Illustration of the data-association problem. A two-node WASN with two active sound sources. The solid lines show the DOAs to the first source, while the dashed lines show the DOAs to the second source. Intersecting the bearing lines from the sensors will result in 4 possible intersection points: the true sources’ locations (red circles) that are estimated by using the correct combination of DOAs and the “ghost” sources (white circles) that are the results of using the erroneous DOA combinations.