Abstract
IT has frequently been noted that on the occasion of great explosions there are curious anomalies in the propagation of the sound. Usually there is a normal zone of audibility in the immediate neighbourhood of the explosion, beyond this a zone of silence, where the sound is not heard, and again outside the zone of silence a second zone of audibility. It is remarkable that while an observer at say 50 miles away may not hear an explosion, an observer at 8o miles may hear it distinctly.
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Propagation of the Sound of Explosions. Nature 110, 619–620 (1922). https://doi.org/10.1038/110619a0
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DOI: https://doi.org/10.1038/110619a0