Explore the city of Monongah, which is located north of the Top of the World. Find the large house, and go down to the basement containing a large amount of laboratory equipment. Use Dr. Eddie Harrison's terminal. Select the "Begin Vox Interpreter Data Collection Exercise" entry to begin the quest.
Locations where the animals could be found will be marked on the map, but there is a strong chance that the animals may not spawn once in the vicinity of the suggested area, so a good option is to either wait for them to appear, or switch to another server in the hopes of getting better targets that are easier to find.
Once all three targets have been tested, return to the basement, place the vox syringer back in the metal box where it was removed from earlier, and load the collected data into the terminal to complete the quest.