Haags Book

Shooting Incident Reconstruction
by Michael G. Haag and Lucien C. Haag (Academic Press, Jun 29, 2011)

Chapter 17: Sound Levels of Gunshots, Supersonic Bullets and Other Impulse Sounds

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Graph, p.308
Showing decrease
of sound over
standoff range for
Ruger 10.22 rifle

Graph, p.327
Showing decrease
of sound over
standoff range for
popped balloons