Extracting changes in air temperature using acoustic coda phase delays | Zendy

Omar Marcillo | Zendy; Stephen Arrowsmith | Zendy; Rod Whitaker | Zendy; Emily A. Morton | Zendy; W. S. Phillips | Zendy

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Extracting changes in air temperature using acoustic coda phase delays

Author(s) -

Omar Marcillo,

Stephen Arrowsmith,

Rod Whitaker,

Emily A. Morton,

W. S. Phillips

Publication year - 2014

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4896404

Subject(s) - coda , amplitude , explosive material , waveform , acoustics , phase (matter) , geology , seismology , physics , optics , chemistry , organic chemistry , quantum mechanics , voltage

Blast waves produced by 60 high-explosive detonations were recorded at short distances (few hundreds of meters); the corresponding waveforms show charge-configuration independent coda-like features (i.e., similar shapes, amplitudes, and phases) lasting several seconds. These features are modeled as reflected and/or scattered waves by acoustic reflectors/scatters surrounding the explosions. Using explosion pairs, relative coda phase delays are extracted and modeled as changes in sound speed due to changes in air temperature. Measurements from nearby weather towers are used for validation.

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