Definition:

Supersonic Crack Distance is how far a bullet travels before it slows down below the speed of sound (~340 m/s). While the bullet is supersonic, every shot produces a sharp crack that enemies can hear at long range. Once the projectile drops under 340 m/s, the crack disappears.

  • High values → the bullet stays supersonic longer (louder, heard further).
  • Low values (close to 0) → the bullet goes subsonic quickly, reducing the audible crack.
  • 0 → the bullet is subsonic from the start, no crack at all.

Formula:

$$\text{Supersonic Crack Distance} = \max\!\left(0,\;\frac{\ln\!\left(\tfrac{340}{v_{0}}\right)}{\text{airFriction}}\right)$$

Where:

  • v0 = initial projectile speed (m/s)
  • airFriction = bullet drag coefficient (negative value in DayZ configs)