Getting Shot At: What Do Bullets Sound Like?

Published on March 25, 2022
Duration: 16:03

This video from Administrative Results explores the distinct sounds of bullets passing overhead, differentiating between the weapon's report and the supersonic crack of projectiles. The host, an experienced firearms content creator, demonstrates how sound signatures vary with caliber, barrel length, and projectile velocity. The experiment highlights practical differences in audible cues for various rifle and pistol platforms, offering valuable insights for firearm enthusiasts and those interested in ballistics.

Quick Summary

The sound of a bullet passing overhead is a combination of the firearm's report (muzzle blast) and, if traveling faster than sound, a supersonic crack. This crack is an audible shockwave from the projectile itself. Suppressors reduce muzzle blast but not the supersonic crack. Caliber and velocity significantly influence the perceived sound, with larger calibers producing a heavier crack.

Chapters

  1. 00:15Introduction to the Experiment
  2. 01:22Firearms Lineup
  3. 02:479mm Pistol Test
  4. 03:07Suppressed 5.56 Test
  5. 04:08Unsuppressed 5.56 Test
  6. 04:535.45x39 AK-74 Test
  7. 05:317.62x39 AKM Test
  8. 06:1812 Gauge Shotgun Test
  9. 07:097.62x51 FAL Test
  10. 08:318mm Mauser Test
  11. 09:377.62x54R Mosin Test
  12. 10:27Caliber Comparison Summary

Frequently Asked Questions

What is the difference between a bullet's sound and a firearm's report?

A firearm's report is the sound of the muzzle blast, caused by expanding gases. A bullet's sound, specifically a supersonic crack, is an audible shockwave created when the projectile travels faster than the speed of sound. These are distinct acoustic phenomena.

Do suppressors eliminate the sound of a bullet?

Suppressors significantly reduce the firearm's muzzle blast, making the weapon quieter. However, they do not eliminate the supersonic crack of a bullet traveling faster than sound. The crack is a result of the projectile's velocity, not the firearm's action.

How does caliber affect the sound of a bullet passing overhead?

Larger caliber bullets, like those from a 7.62x51mm or 8mm Mauser, tend to produce a more pronounced and 'heavy' supersonic crack compared to smaller calibers such as 5.56x45mm. The overall weapon report also varies significantly.

Can you hear a supersonic crack from a 9mm pistol at 25 yards?

Typically, at closer distances like 25 yards, a 9mm pistol round may not produce a discernible supersonic crack. At this range, the audible sound is primarily the gunshot report (muzzle blast) from the firearm itself.

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