A tri-functional dual earphone device is disclosed. A congestion detection system may comprise a detection system, an abatement system, and a cauzation system. After sequential transfer of data to the buffer memory, the presence of the selected code value in the buffer memory indicates that a dropout occured. One feature analyzes the complexity of Vector Field SLAM with respect to area size and number of signals and then describe an approximation that decouples the localization map in order to keep memory and run-time requirements low. The method further comprises receiving a first input from the viewer regarding selection of the option to receive the plurality of sequential data supplements.