2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128299This paper presents a method for using a PC soundcard, microphone and a chronograph to determine bullet BC with an accuracy of 6%. This is useful when a second chronograph is unavailable or when the projectile accuracy is insufficient to use a far chronograph.Related to forensic science (shooting event reconstruction)Popular Physicstext