1 To comply with Department of Defense changes to common access cards, and to comply with Homeland Security Presidential Directive 12, the Fort Knox One Stop In-processing Center has recently started implementing changes to the CAC issuing process.
acoustics - the study of the physical properties of sound. acoustic radiation pressure - (acoustics) the pressure exerted on a surface normal to the direction of propagation of a sound wave. physical science, physics - the physical properties, phenomena, and laws of something; he studied the physics of radiation. harmonics - the study of musical sound.
: noise produced in a radio or television receiver by atmospheric or various natural or man-made electrical disturbances; also: the electrical disturbances producing this noise. 2. : heated opposition or criticism. â statÂ·icky \Ësta-ti-kÄ\ adjective. See static defined for English-language learners.