Acronyms
DEW : A directed-energy weapon (DEW) is a ranged weapon that damages its target with highly focused energy without a solid projectile, including lasers, microwaves, particle beams, and sound beams.
LRAD : A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon. There are indeed, directional models : these AHDs are characterized by their ability to create long-range, directional voice communications and warning tones. Their directionality is typically 5° to 60° radius conical at a 2 kHz tone. Note for readability : I consider LRAD a subset of DEW like specified above.
V2K : Voice-to-Skull (official acronym, see FAS definition here) : devices engineered to make the target hear sounds or voices. In defense ecosystem, nicknamed LRAD.