DIFAR DIFARDirectional Frequency Analysis and Recording device; passive acoustic sonobuoy Related Articles: What is intensity?How is sound used to find submarines?What components of sound are used for hearing?SonobuoysModerate or eliminate the effects of human activitiesVector SensorsTutorial: How can we moderate or eliminate the effects of human activities? Chris Knowlton2017-02-26T20:09:58-05:00