Where does the probe into the sonic weapon used on March 15 stand?

Civil society organizations have collected testimonies from more than 3,000 citizens regarding the incident, which took place during a peaceful protest on March 15. Witnesses described hearing a sound unlike anything they had encountered before, an experience many found difficult to put into words. It was most commonly described as a deafening roar resembling a jet engine or a passing train, occasionally accompanied by a distinct wave of heat.