title: High-frequency measurements of blast wave propagation.
abstract: Blast wave propagation measurements were conducted to investigate nonlinear propagation effects on blast waveform evolution with distance. Measurements were made with a wide-bandwidth capacitor microphone for comparison with conventional 3.175-mm (1/8-in.) microphones with and without baffles. It was found that the 3.175-mm microphone did not have sufficient high-frequency response to capture the actual rise times in some regions. For a source of 0.57 kg (1.25 lb) of C-4 plastic explosive, the trend observed is that nonlinear effects steepened the waveform, thereby decreasing the shock rise time, up to a range of 50 m. At 100 m, the rise times had increased slightly.
authors.forename: Alexandra
authors.initials: A
authors.lastname: Loubeau
authors.forename: Victor W
authors.initials: VW
authors.lastname: Sparrow
authors.forename: Larry L
authors.initials: LL
authors.lastname: Pater
authors.forename: Wayne M
authors.initials: WM
authors.lastname: Wright
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D000818:Animals; D001753:Blast Injuries / Q000503:physiopathology*; D005107:Explosions; D006317:Hearing Loss, Noise-Induced / Q000503:physiopathology*; D006801:Humans; D017711:Nonlinear Dynamics