A real‐time direction finding device for determining the bearing to the underwater sounds of Southern Right Whales, Eubalaena australis Available to Purchase

The correlation of sounds with behavior in groups of free‐ranging whales has been restricted by the difficulty of determining which animal made the sound. A real‐time device was designed and built to directionalize on the underwater sounds of Southern Right Whales, Eubalaena australis. The device measures the phase difference between the signals from a two‐dimensional hydrophone array and calculates a bearing to the sound source. Results of field calibration tests demonstrated that the system could reliably directionalize on right whale sounds with a resolution of ±12° except for arrival bearings within 25° of the array’s axis.