Outdoor measurements of spherical acoustic shock decay.

Abstract

Prior anechoic measurements of a small acetylene-oxygen balloon explosion were used to study spherical weak-shock decay over short ranges [Muhlestein et al., J. Acoust. Soc. Am. 131, 2422-2430 (2012)]. Here, longer-range measurements conducted at the Bonneville Salt Flats with a larger balloon are described. Waveform and spectral characteristics and comparisons of the peak pressure decay with an analytical weak-shock model are presented. Weak shocks persist to at least 305 m, with an amplitude decay that is predicted reasonably well using the model. Deviations are discussed in the context of atmospheric effects and nonlinear ground reflections.

• Authors: Sarah M Young, Kent L Gee, Tracianne B Neilsen, Kevin M Leete
• Journal: The Journal of the Acoustical Society of America (J Acoust Soc Am) Vol. 138 Issue 3 Pg. EL305-10 (Sep 2015) ISSN: 1520-8524 [Electronic] United States
• PMID: 26428831 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.)