"The active denial system is a non-lethal, directed-energy, counter-personnel weapon system owned by the US military. It consists of a gyrotron, which generates and focuses a high-energy millimeter-wave radio frequency beam (a type of electromagnetic radiation) onto a target to provide a very hot, skin surface-burning sensation."
The Active Denial System: What Is It And What Does It Do? - https://www.scienceabc.com/innovation/the-active-denial-system-test-what-is-it-what-does-it-do.html
Sounds like these people are getting hit with ADS (Active Denial System) rather than a regular LRAD.
"95 GigaHertz, its frequency is much higher than a microwave (2.45 GHz) and since it is fired for very short durations, it produces only a heat sensation on the skin surface. " US Military's 'Active Denial System' Is a 95 GHz Heat Ray - https://interestingengineering.com/us-militarys-active-denial-system-is-a-95-ghz-heat-ray
"The active denial system is a non-lethal, directed-energy, counter-personnel weapon system owned by the US military. It consists of a gyrotron, which generates and focuses a high-energy millimeter-wave radio frequency beam (a type of electromagnetic radiation) onto a target to provide a very hot, skin surface-burning sensation."
The Active Denial System: What Is It And What Does It Do? - https://www.scienceabc.com/innovation/the-active-denial-system-test-what-is-it-what-does-it-do.html