Music
form of art using sound and silence
Can music be used as a weapon?
Music is an art form whose medium is sound. Music can help elevate or subdue emotions. People connect to music through the sound. The military uses loud music to cause psychological disorientation and confusion  The military calls the use of loud disorienting music part of psychological operations. 
In what ways does the military used music in operations? Is any of #1 as a weapon?