An acoustic weapon is a device that uses sound waves to incapacitate or deter individuals. These weapons can produce loud noises or specific frequencies that can cause discomfort, disorientation, or even physical harm. They are often used in crowd control situations by law enforcement or military forces. Some acoustic weapons are designed to emit focused sound beams, targeting specific areas or individuals without affecting a wider area. Examples include the Long Range Acoustic Device (LRAD), which is used for communication and crowd dispersal. The effectiveness and ethical implications of using such weapons are subjects of ongoing debate.