I am new to shooting with a suppressor on my rifles and have maybe a stupid question to ask. I am using the same suppressor on .223, .308 and .300 Win Mag. The supersonic crack is created when the bullet exceeds the speed of sound or about 1152 feet/sec. at sea level. My loads in the .308, for example, chrono at 2640 fps. Question is does the intensity (loudness) of the supersonic crack increase with speed or does it remain about the same. In other words, if a bullet traveling at 1200 fps cracks then does a bullet traveling at 2600 fps(a little over twice the speed of sound) produce a louder crack?