You are so right. The gang-bangers are going to have a field day with this one! There's no scientific calibration to measure any inherent difference between and beyond immediate Decibel levels. Some sounds are loud. Some are soft. Fireworks, car backfires, a 9mm, or even a pillow fight, are all the same on the chart; if every source is sufficiently evolved to meet the noise levels of gunfire. I know. I went to school about the subject. I also ran army firing ranges. That was fun and I assure you there's no measurable Decibel difference between a 5.56mm round and the cease fire siren! It's all between the ears of 'common sense'. This story is all about "Junk Technology". How did that old song go, "Bang, bang! Shoot 'em up destiny"?