In extreme cases, sonic weapons can cause nausea, dizziness, and even permanent damage. In this case, officials used it to declare unlawful assembly.

A military‑grade device capable of projecting a deafening, focused sound was deployed during a tense anti‑ICE protest in Minnesota Monday night. State patrol troopers faced off with protesters outside ...

Alarmed by a spike in pepper spray use and threats of sound cannons at protests, human rights groups want a review of "less lethal" weapons for crowd control.

The wave of violence by Immigration and Customs Enforcement and Customs and Border Protection has brought law enforcement’s use of force coming under renewed scrutiny — though even so-called “less ...