Report Does a blast diffuser work? in Firearm Industry News and Gossip Posted October 5 On 9/29/2022 at 8:58 PM, sketch said: Information.. nice vid. 🍻 I've never herd of a sound test from down range before? I have been down range from gunfire, but what does it meter at range?? The robo is good in this one! 😈 Might have to try it for ya. Set up my phone facing the meter around 100yrds away. Shooting at a target around 10-20yrds away from the meter set up for reference. I bet it would be around 100db unsuppressed 5.56. I honestly have no idea lol.