As we reported these acoustic devices were used against protesters in Canberra on Saturday. Cairnsnews spoke to one protester, an ex-serviceman from RAAF who said the technology is basic but effective which made him unwell and left him dizzy with ringing ears.
The operators in the video above warns getting too close the sonic blaster, which can emit more than 150 decibels, can shatter eardrums.
In the video below Aussie Cossack asks individual police officers if they will give a young girl some ear plugs to protect her from the debilitating sound waves. It seems the officers are deaf and mute. Maybe its their earplugs and masks? How did they get a job with ACT or Australian Federal police? We can guess.