where w is the charge weight in pounds (Urick 1975). For instance, 100 lb of TNT would produce a
shockwave SL of 284 dB re 1µPa @ 1 m with almost constant frequency content from 10 to 1000 Hz. The
energy from the bubble pulse oscillations will contribute approximately 5 additional dB of source level,
yielding a total SL of 274 dB re 1µPa @ 1 m. Research on blast damage to animals suggests that the mechanical impact of a short duration pressure pulse (positive acoustic impulse) is best correlated with
organ damage (Greene and Moore 1995).