Flash Reports are preloaded concussions which produce an extremely loud bang with a white flash and puff of smoke. (Must be used in conjunction with a concussion pot)
The dBA readings for Flash Reports are:
You can also find a copy of the independent report on Air Overpressure of Le Maitre Flash Reports (Concussion effects) by Dr Rob Farnfield, the Technical Services Manager at Exchem Explosives. (See PDF file Farnfield Report, in the Documents link on this page).